Observation of a lattice instability at the field-induced phase transition of 
the spin-gapped compound Cu2(C5H12N2)2Cl4

Lorenzo, J. E.; Katsumata, K.; Narumi, Y.; Shimomura, S.; Tanaka, Y.; Hagiwara, M.; Mayaffre, H.; Berthier, C.; Piovesana, O.; Ishikawa, T.; Kitamura, H.

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Observation of a lattice instability at the field-induced phase transition of the spin-gapped compound Cu₂(C₅H₁₂N₂)₂Cl₄

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Berthier, C.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Lorenzo, J. E., Katsumata, K., Narumi, Y., Shimomura, S., Tanaka, Y., Hagiwara, M., et al. (2004). Observation of a lattice instability at the field-induced phase transition of the spin-gapped compound Cu₂(C₅H₁₂N₂)₂Cl₄. Physical Review B, 69(22): 220409.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F619-1

Abstract

We report the observation of a jump in the a- and c-lattice constants
at the critical field H-c1 and at temperatures of the order 40 mK in
the S=1/2 spin-gapped compound Cu-2(C5H12N2)(2)Cl-4 by means of
synchrotron x-ray diffraction. This anomaly, characteristic of a
first-order phase transition, results from the development and further
stabilization of a symmetry breaking magnetic long-range order.