Phase transitions in single-crystalline magnetoelectric LiCoPO4

A. Szewczyk; M. U. Gutowska; J. Wieckowski; A. Wisniewski; R. Puzniak; R. Diduszko; Yu. Kharchenko; M. F. Kharchenko; H. Schmid

doi:10.1103/PhysRevB.84.104419

Phase transitions in single-crystalline magnetoelectric LiCoPO4

Materials Science 2011-09-14 v1

Authors: A. Szewczyk , M. U. Gutowska , J. Wieckowski , A. Wisniewski , R. Puzniak , R. Diduszko , Yu. Kharchenko , M. F. Kharchenko , H. Schmid

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Abstract

Specific heat, magnetic torque, and magnetization studies of LiCoPO4 olivine are presented. They show that an unique set of physical properties of LiCoPO4 leads to the appearance of features characteristic of 2D Ising systems near the Neel temperature, T_N =21.6 K, and to the appearance of an uncommon effect of influence of magnetic field on the magnetocrystalline anisotropy. The latter effect manifests itself as a first-order transition, discovered at ~9 K, induced by magnetic field of 8 T. Physical nature of this transition was explained and a model describing experimental dependences satisfactorily was proposed.

Keywords

lithium cobalt phosphate magnetoelectric phase transition ising system magnetocrystalline anisotropy specific heat

Cite

@article{arxiv.1107.5960,
  title  = {Phase transitions in single-crystalline magnetoelectric LiCoPO4},
  author = {A. Szewczyk and M. U. Gutowska and J. Wieckowski and A. Wisniewski and R. Puzniak and R. Diduszko and Yu. Kharchenko and M. F. Kharchenko and H. Schmid},
  journal= {arXiv preprint arXiv:1107.5960},
  year   = {2011}
}

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accepted for publishing in Physical Review B

Phase transitions in single-crystalline magnetoelectric LiCoPO4

Abstract

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