What is it about?

TiPO4 undergoes upon cooling a phase transition towards an incommensurate phase (T = 112 K) and then towards a a spin-Peierls distortion with a dimerization of the Ti chains (T = 75 K).

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Why is it important?

While the nature of the phase transition at T = 112 K is of second order, the lock-in transition at T = 75 K is of weak first order.

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This page is a summary of: Spin-Peierls distortions in TiPO4, Physical Review B, November 2013, American Physical Society (APS), DOI: 10.1103/physrevb.88.184420.
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