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Spin-lattice instability to a fractional magnetization state in the spinel HgCr$$_{2}$$O$$_{4}$$

Matsuda, Masaaki; Ueda, Hiroaki*; Kikkawa, Akiko*; Tanaka, Yoshikazu*; Katsumata, Koichi*; Narumi, Yasuo*; Inami, Toshiya; Ueda, Yutaka*; Lee, S.-H.*

Cr-CrCr-based spinel compounds ACr$$_{2}$$O$$_{4}$$ (A=Mg, Zn, Cd, and Hg) are so far the best model systems for a network of corner-sharing tetrahedrons with isotropic nearest-neighbor antiferromagnetic interactions. The systems exhibit novel spin-Peierls phase transitions from cubic spin liquid to non-cubic N$'e$el states at low temperatures. Recent bulk magnetization studies on CdCr$$_{2}$$O$$_{4}$$ and HgCr$$_{2}$$O$$_{4}$$ revealed the magnetic field-induced half magnetization plateau states that are stable over a wide range of field. Recent bulk magnetization studies on CdCr$$_{2}$$O$$_{4}$$ and HgCr$$_{2}$$O$$_{4}$$ revealed the magnetic field-induced half magnetization plateau states that are stable over a wide range of field.

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Category:Physics, Multidisciplinary

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