All Stories

  1. Improvement of the saturation magnetization of PEG coated superparamagnetic iron oxide nanoparticles

    Article • Journal of Magnetism and Magnetic Materials, June 2022, Elsevier

    Hakan Köçkar

  2. Evaluation of properties of sputtered Ni/Cu films with different thicknesses of the Cu layer

    Article • Thin Solid Films, June 2021, Elsevier

    Hakan Köçkar

  3. Optimisation of saturation magnetisation of iron nanoparticles synthesized by hydrogen reduction: Taguchi technique, response surface method, and multiple linear and quadratic regression analyses

    Article • Journal of Magnetism and Magnetic Materials, March 2019, Elsevier

    Hakan Köçkar

  4. The influence of synthesis parameters on one-step synthesized superparamagnetic cobalt ferrite nanoparticles with high saturation magnetization

    Article • Journal of Magnetism and Magnetic Materials, March 2019, Elsevier

    Hakan Köçkar

  5. Optimization of Fe content in Electrodeposited FeCoCu/Cu magnetic multilayer

    Article • Thin Solid Films, March 2019, Elsevier

    Hakan Köçkar

  6. Characterization of tartaric acid and ascorbic acid coated iron oxide nanoparticles and their biocompatibility studies

    Article • Journal of Magnetism and Magnetic Materials, November 2018, Elsevier

    Hakan Köçkar

  7. Influence of Biocompatible Surfactants on Structural and Corresponding Magnetic Properties of Iron Oxide Nanoparticles Coated by Hydrothermal Process

    Article • Journal of Magnetism and Magnetic Materials, November 2018, Elsevier

    Hakan Köçkar

  8. Superparamagnetic zinc ferrite: A correlation between high magnetizations and nanoparticle sizes as a function of reaction time via hydrothermal process

    Article • Journal of Magnetism and Magnetic Materials, November 2018, Elsevier

    Hakan Köçkar

  9. The Role of Wheel Surface Quality on Structural and Hard Magnetic Properties of Nd–Fe–B Permanent Magnet Powders

    Article • Journal of Superconductivity and Novel Magnetism, January 2018, Springer Science + Business Media

    Hakan Köçkar

  10. ​The effect of non-magnetic layer thickness in the electrodeposited CoCu/Cu multilayers

    Article • Zeitschrift für Naturforschung A, January 2018, De Gruyter

    Hakan Köçkar, Atakan Tekgül, ALPER MURSEL

  11. Novel debittering process of green table olives: application of β-glucosidase bound onto superparamagnetic nanoparticles

    Article • CyTA - Journal of Food, January 2018, Taylor & Francis

    Hakan Köçkar

  12. Giant Magnetoresistance in Electrochemical Deposited CoFe/Cu Multilayers Depending on Fe Concentration

    Article • Journal of Superconductivity and Novel Magnetism, December 2017, Springer Science + Business Media

    Hakan Köçkar

  13. Electrochemical, Structural and Magnetic Analysis of Electrodeposited CoCu/Cu Multilayers: Influence of Cu Layer Deposition Potential

    Article • Journal of Electronic Materials, December 2017, Springer Science + Business Media

    Hakan Köçkar

  14. Giant magnetoresistance (GMR) behavior of electrodeposited NiFe/Cu multilayers: Dependence of non-magnetic and magnetic layer thicknesses

    Article • Journal of Magnetism and Magnetic Materials, December 2017, Elsevier

    Hakan Köçkar

  15. Impact of Deposition Rate on the Structural and Magnetic Properties of Sputtered Ni/Cu Multilayer Thin Films

    Article • Zeitschrift für Naturforschung A, November 2017, De Gruyter

    Hakan Köçkar

  16. Magnetic Texture Analysis of Co–Cu Films in 2D

    Article • Zeitschrift für Naturforschung A, May 2017, De Gruyter

    mehmet bayirli, Hakan Köçkar

  17. Simple electrodepositing of CoFe/Cu multilayers: Effect of ferromagnetic layer thicknesses

    Article • Journal of Magnetism and Magnetic Materials, January 2017, Elsevier

    Hakan Köçkar

  18. Facile electrodeposition CoCu/Cu multilayers: deposition potentials for magnetic layers

    Article • Journal of Materials Science, November 2016, Springer Science + Business Media

    Hakan Köçkar

  19. A Simple Method of Synthesis and Characterizations of Oleate-Coated Iron Oxide Nanoparticles

    Article • Journal of Superconductivity and Novel Magnetism, October 2016, Springer Science + Business Media

    Hakan Köçkar

  20. A Facile Method to Synthesize Nickel Ferrite Nanoparticles: Parameter Effect

    Article • Journal of Superconductivity and Novel Magnetism, September 2016, Springer Science + Business Media

    Hakan Köçkar

  21. A simple way to obtain high saturation magnetization for superparamagnetic iron oxide nanoparticles synthesized in air atmosphere: Optimization by experimental design

    Article • Journal of Magnetism and Magnetic Materials, July 2016, Elsevier

    Hakan Köçkar

  22. Magnetoresistance behaviour in CoFe/Cu multilayers: thin Cu layer effect

    Article • Journal of Materials Science Materials in Electronics, May 2016, Springer Science + Business Media

    Hakan Köçkar

  23. Electrodeposition and Characterization of Co/Cu Multilayers

    Article • Acta Physica Polonica A, April 2016, Institute of Physics, Polish Academy of Sciences

    Hakan Köçkar

  24. Properties of electrodeposited Co–Mn films: Influence of deposition parameters

    Article • Applied Surface Science, December 2015, Elsevier

    Hakan Köçkar

  25. Erratum to: Relation between ferromagnetic layer thickness (NiCu) and properties of NiCu/Cu multilayers

    Article • Journal of Materials Science Materials in Electronics, May 2015, Springer Science + Business Media

    Hakan Köçkar

  26. Relation between ferromagnetic layer thickness (NiCu) and properties of NiCu/Cu multilayers

    Article • Journal of Materials Science Materials in Electronics, April 2015, Springer Science + Business Media

    Hakan Köçkar

  27. A study on total thickness dependency: microstructural, magnetoresistance and magnetic properties of electrochemically deposited permalloy based multilayers

    Article • Journal of Materials Science Materials in Electronics, April 2015, Springer Science + Business Media

    Hakan Köçkar

  28. Characterizations of Electrodeposited NiCoFe Ternary Alloys: Influence of deposition potential

    Article • Journal of Materials Science Materials in Electronics, March 2015, Springer Science + Business Media

    Hakan Köçkar

  29. Growth of binary Ni–Fe films: Characterisations at low and high potential levels

    Article • Journal of Magnetism and Magnetic Materials, March 2015, Elsevier

    Hakan Köçkar

  30. The effect of ferromagnetic and non-ferromagnetic layer thicknesses on the electrodeposited CoFe/Cu multilayers

    Article • Journal of Materials Science Materials in Electronics, January 2015, Springer Science + Business Media

    Hakan Köçkar

  31. Electrodeposited CoFeCu films at high and low pH levels: structural and magnetic properties

    Article • Journal of Materials Science Materials in Electronics, January 2015, Springer Science + Business Media

    Hakan Köçkar

  32. Change in planar hall effect ratio of Ni–Co films produced by electrodeposition

    Article • Journal of Magnetism and Magnetic Materials, January 2015, Elsevier

    Hakan Köçkar

  33. Characterizations of FeCl/Cu superlattices sputtered at low and high deposition rates of ferromagnetic layer

    Article • Journal of Magnetism and Magnetic Materials, January 2015, Elsevier

    Hakan Köçkar

  34. Growth and characterizations of magnetic nanoparticles under hydrothermal conditions: Reaction time and temperature

    Article • Journal of Magnetism and Magnetic Materials, January 2015, Elsevier

    Hakan Köçkar

  35. Properties of electrodeposited CoFe/Cu multilayers: The effect of Cu layer thickness

    Article • Journal of Magnetism and Magnetic Materials, January 2015, Elsevier

    Hakan Köçkar

  36. Electrodeposited NiFeCu/Cu multilayers: Effect of Fe ion concentration on properties

    Article • Journal of Magnetism and Magnetic Materials, January 2015, Elsevier

    Hakan Köçkar

  37. Study of Electrolyte pH in Production of Cu–Co–Ni Ternary Alloys and Its Effect on Microstructural and Magnetic Properties

    Article • IEEE Transactions on Magnetics, November 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Hakan Köçkar

  38. Superparamagnetic Cobalt Ferrite Nanoparticles: Effect of Temperature and Base Concentration

    Article • Journal of Superconductivity and Novel Magnetism, October 2014, Springer Science + Business Media

    Hakan Köçkar

  39. Growth of Iron Oxide Nanoparticles by Hydrothermal Process: Effect of Reaction Parameters on the Nanoparticle Size

    Article • Journal of Superconductivity and Novel Magnetism, September 2014, Springer Science + Business Media

    Hakan Köçkar

  40. Microstructure dependence of magnetic properties on electrochemically produced ternary CuCoNi alloys

    Article • Journal of Materials Science Materials in Electronics, August 2014, Springer Science + Business Media

    Hakan Köçkar

  41. Use of triethylene glycol monobutyl ether in synthesis of iron oxide nanoparticles

    Article • Journal of Magnetism and Magnetic Materials, June 2014, Elsevier

    Hakan Köçkar

  42. Electrodeposited NiCoFe films from electrolytes with different Fe ion concentrations

    Article • Journal of Magnetism and Magnetic Materials, June 2014, Elsevier

    Hakan Köçkar

  43. Parametric characterizations in superparamagnetic latex

    Article • Bulletin of Materials Science, May 2014, Springer Science + Business Media

    Hakan Köçkar

  44. Characterisations of CoFeCu films: Influence of Fe concentration

    Article • Journal of Alloys and Compounds, February 2014, Elsevier

    Hakan Köçkar

  45. Scanning of nickel sulfamate concentration in electrodeposition bath used for production of Ni–Co alloys

    Article • Journal of Materials Science Materials in Electronics, May 2013, Springer Science + Business Media

    Hakan Köçkar

  46. Superparamagnetic iron oxide nanoparticles: effect of iron oleate precursors obtained with a simple way

    Article • Journal of Materials Science Materials in Electronics, April 2013, Springer Science + Business Media

    Hakan Köçkar

  47. Reduction and characterizations of iron particles: influence of reduction parameters

    Article • Journal of Materials Science Materials in Electronics, February 2013, Springer Science + Business Media

    Hakan Köçkar

  48. Influence of deposition potential on the electrodeposited Ternary CoFeCu films

    Article • Journal of Materials Science Materials in Electronics, February 2013, Springer Science + Business Media

    Hakan Köçkar

  49. Giant Magnetoresistance and Magnetic Properties of CoFe/Cu Multilayer Films: Dependence of Electrolyte pH

    Article • Journal of Superconductivity and Novel Magnetism, January 2013, Springer Science + Business Media

    Hakan Köçkar

  50. Characterizations of NiCu/Cu Multilayers: Dependence of Nonmagnetic Layer Thickness

    Article • Journal of Superconductivity and Novel Magnetism, January 2013, Springer Science + Business Media

    Hakan Köçkar

  51. Effect of Co and Cu Layer Thicknesses on Characterization of Electrodeposited Co/Cu Multilayers

    Article • Sensor Letters, January 2013, American Scientific Publishers

    Hakan Köçkar

  52. Properties of Electrodeposited CoFeNi/Cu Superlattices: The Effect of CoFeNi and Cu Layers Thicknesses

    Article • Journal of Superconductivity and Novel Magnetism, December 2012, Springer Science + Business Media

    Hakan Köçkar

  53. Differences observed in properties of ternary NiCoFe films electrodeposited at low and high pH

    Article • Journal of Materials Science Materials in Electronics, December 2012, Springer Science + Business Media

    Hakan Köçkar

  54. Influence of Co:Cu ratio on properties of Co–Cu films deposited at different conditions

    Article • Journal of Magnetism and Magnetic Materials, November 2012, Elsevier

    Hakan Köçkar

  55. Electrodeposited Co–Ni Films: Electrolyte pH—Property Relationships

    Article • Journal of Superconductivity and Novel Magnetism, October 2012, Springer Science + Business Media

    Hakan Köçkar

  56. Iron Oxide Nanoparticles Co-Precipitated in Air Environment: Effect of [Fe$^{+2}$]/[Fe$^{+3}$] Ratio

    Article • IEEE Transactions on Magnetics, April 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Hakan Köçkar

  57. Effect of film thickness on properties of electrodeposited Ni–Co films

    Article • Applied Surface Science, April 2012, Elsevier

    Hakan Köçkar

  58. Electrodeposited Ni–Co films from electrolytes with different Co contents

    Article • Applied Surface Science, February 2012, Elsevier

    Hakan Köçkar

  59. Electrical properties of Poly(ethylene glycol dimethacrylate-n-vinyl imidazole)/Single Walled Carbon Nanotubes/n-Si Schottky diodes formed by surface polymerization of Single Walled Carbon Nanotubes

    Article • Thin Solid Films, January 2012, Elsevier

    Hakan Köçkar

  60. Magnetic Characterizations of Cobalt Oxide Nanoparticles

    Article • Journal of Superconductivity and Novel Magnetism, September 2011, Springer Science + Business Media

    Hakan Köçkar

  61. Effect of Synthesis Parameters on the Properties of Superparamagnetic Iron Oxide Nanoparticles

    Article • Journal of Superconductivity and Novel Magnetism, August 2011, Springer Science + Business Media

    Hakan Köçkar

  62. Superparamagnetic latex synthesized by a new route of emulsifier-free emulsion polymerization

    Article • Journal of Applied Polymer Science, March 2011, Wiley

    Hakan Köçkar

  63. The effect of different chemical compositions caused by the variation of deposition potential on properties of Ni–Co films

    Article • Applied Surface Science, February 2011, Elsevier

    Hakan Köçkar

  64. Composition Dependence of Structural and Magnetic Properties of Electrodeposited Co-Cu Films

    Article • IEEE Transactions on Magnetics, December 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Hakan Köçkar

  65. A Simple Way to Synthesize Superparamagnetic Iron Oxide Nanoparticles in Air Atmosphere: Iron Ion Concentration Effect

    Article • IEEE Transactions on Magnetics, December 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Hakan Köçkar

  66. Emulsifier-free emulsion polymerization of methyl methacrylate containing hydrophilic magnetite nanoparticles

    Article • Macromolecular Research, December 2010, Springer Science + Business Media

    Hakan Köçkar

  67. Paraoxonase 1-Bound Magnetic Nanoparticles: Preparation and Characterizations

    Article • Journal of Nanoscience and Nanotechnology, November 2010, American Scientific Publishers

    Hakan Köçkar

  68. Co–Fe Films: Effect of Fe Content on Their Properties

    Article • Journal of Nanoscience and Nanotechnology, November 2010, American Scientific Publishers

    Hakan Köçkar

  69. The Effect of Fe Content in Electrodeposited CoFe/Cu Multilayers on Structural, Magnetic and Magnetoresistance Characterizations

    Article • Journal of Nanoscience and Nanotechnology, November 2010, American Scientific Publishers

    Hakan Köçkar

  70. Properties of Iron Oxide Nanoparticles Synthesized at Different Temperatures

    Article • Journal of Superconductivity and Novel Magnetism, October 2010, Springer Science + Business Media

    Hakan Köçkar

  71. Electrodeposited Cobalt Films: Alteration Caused by the Electrolyte pH

    Article • Journal of Superconductivity and Novel Magnetism, October 2010, Springer Science + Business Media

    Hakan Köçkar

  72. Characterisations of CoCu films electrodeposited at different cathode potentials

    Article • Journal of Magnetism and Magnetic Materials, May 2010, Elsevier

    Hakan Köçkar

  73. Contribution of electrolyte pH and deposition potentials to the magnetic anisotropy of electrodeposited nickel films

    Article • Journal of Magnetism and Magnetic Materials, May 2010, Elsevier

    Hakan Köçkar

  74. Role of electrolyte pH on structural and magnetic properties of Co–Fe films

    Article • Journal of Magnetism and Magnetic Materials, May 2010, Elsevier

    Hakan Köçkar

  75. A new example of the diffusion-limited aggregation: Ni–Cu film patterns

    Article • Applied Surface Science, February 2010, Elsevier

    Hakan Köçkar

  76. Properties of Co–Fe Films: Dependence of Cathode Potentials

    Article • IEEE Transactions on Magnetics, February 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Hakan Köçkar

  77. Dependence of Magnetoresistance in Electrodeposited CoNiCu/Cu Multilayers on Ni Composition

    Article • January 2010, The Electrochemical Society

    Hakan Köçkar

  78. A Numeric Application Using Diffusion Limited Aggregation Model for the Manganese Dendrites

    Article • Zeitschrift für Naturforschung A, January 2010, De Gruyter

    Hakan Köçkar

  79. Determination of Texture Orientation Related Magnetic Properties of Nickel-Cobalt Films

    Article • Zeitschrift für Naturforschung A, January 2010, De Gruyter

    Hakan Köçkar

  80. Magnetoresistance of CoNiCu/Cu Multilayers Electrodeposited from Electrolytes with Different Ni Ion Concentrations

    Article • Journal of The Electrochemical Society, January 2010, The Electrochemical Society

    Hakan Köçkar

  81. Electrochemical production of Fe-Cu films: determination of the deposition potentials and their effect on microstructural and magnetic properties

    Article • The European Physical Journal Applied Physics, November 2009, EDP Sciences

    Hakan Köçkar

  82. The Role of Cu Content on Properties of Electrodeposited Fe-Cu Films

    Article • Sensor Letters, June 2009, American Scientific Publishers

    Hakan Köçkar

  83. Influence of Deposition Parameters of Novel Vacuum Coating Plant on Evaporated Ni60Fe40 and Ni80Fe20 Films

    Article • Sensor Letters, June 2009, American Scientific Publishers

    Hakan Köçkar

  84. Comparison of Ni–Cu alloy films electrodeposited at low and high pH levels

    Article • Journal of Alloys and Compounds, April 2008, Elsevier

    Hakan Köçkar

  85. Growth and Characterisation of Electrodeposited Co/Cu Superlattices

    Article • Journal of Nanoscience and Nanotechnology, February 2008, American Scientific Publishers

    Hakan Köçkar

  86. Parameters affecting microstructure and magnetoresistance of electrodeposited Co–Cu alloy films

    Article • Journal of Magnetism and Magnetic Materials, September 2006, Elsevier

    Hakan Köçkar

  87. Magnetic anisotropy and its thickness dependence for NiFe alloy films electrodeposited on polycrystalline Cu substrates

    Article • Journal of Magnetism and Magnetic Materials, September 2006, Elsevier

    Hakan Köçkar

  88. Influence of deposition potentials applied in continuous and pulse waveforms on magnetic properties of electrodeposited nickel–iron films

    Article • Sensors and Actuators A Physical, May 2006, Elsevier

    Hakan Köçkar

  89. Production and characterisations of thin films deposited by a novel vacuum coating plant (VCP)

    Article • Sensors and Actuators A Physical, May 2006, Elsevier

    Hakan Köçkar

  90. Uniaxial in-plane magnetic anisotropy in silicon-iron films prepared using vacuum coating plant (VCP)

    Article • The European Physical Journal Applied Physics, March 2005, EDP Sciences

    Hakan Köçkar

  91. Effect of potantiostatic waveforms on properties of electrodeposited NiFe alloy films

    Article • The European Physical Journal B, December 2004, Springer Science + Business Media

    Hakan Köçkar

  92. Rotation Speed-Induced Uniaxial In-Plane Anisotropy in Thin Films Deposited Onto a Rotating Substrate

    Article • Journal of Superconductivity and Novel Magnetism, August 2004, Springer Science + Business Media

    Hakan Köçkar

  93. The influence of deposition parameters on production of soft Fe $\mathsf{_{81}}$Co $\mathsf{_{13.5}}$Si $\mathsf{_{3.5}}$C$\mathsf{_{2}}$ and Fe $\mathsf{_{67}}$Co $\mathsf{_{18}}$Si$\mathsf{_{1}}$B $\mathsf{_{14}}$ films

    Article • The European Physical Journal B, June 2004, Springer Science + Business Media

    Hakan Köçkar

  94. Magnetic characterization of silicon–iron magnetic material produced by a novel rotating cryostat

    Article • Journal of Magnetism and Magnetic Materials, January 2003, Elsevier

    Hakan Köçkar

  95. The rotation and clamping effect on the magnetic properties of iron films deposited onto a rotating substrate

    Article • Physica B Condensed Matter, August 2002, Elsevier

    Hakan Köçkar

  96. Factors affecting magnetic properties of evaporated iron films

    Article • Journal of Magnetism and Magnetic Materials, April 2002, Elsevier

    Hakan Köçkar

  97. Characterisation of evaporated and laser-ablated 3% silicon–iron

    Article • Journal of Magnetism and Magnetic Materials, April 2002, Elsevier

    Hakan Köçkar

  98. Article • The European Physical Journal B, April 2002, Springer Science + Business Media

    Hakan Köçkar

  99. Investigation of deposition parameters and output functions, and production of low coercivity films

    Article • The European Physical Journal Applied Physics, March 2002, EDP Sciences

    Hakan Köçkar

  100. In-plane anisotropy and stress detection of films deposited by RC technique

    Article • The European Physical Journal B, December 2001, Springer Science + Business Media

    Hakan Köçkar