Quasi-one-dimensional antiferromagnetism and multiferroicity in CuCrO4

Article

关键词: SPIN-EXCHANGE INTERACTIONS;    TOTAL-ENERGY CALCULATIONS;    ANGULAR OVERLAP MODEL;    WAVE BASIS-SET;    MAGNETIC-STRUCTURE;    ELECTRONIC-SPECTRA;    CHAIN;    HEISENBERG;    CHROMATE;    LICUVO4;   

DOI  :  10.1103/PhysRevB.84.014426

来源: SCIE

【 摘 要 】

The bulk magnetic properties of the new quasi-one-dimensional Heisenberg antiferromagnet, CuCrO4, were characterized by magnetic susceptibility, heat capacity, optical spectroscopy, electron paramagnetic resonance and dielectric capacitance measurements, and density functional evaluations of the intrachain and interchain spin-exchange interactions. We found type-II multiferroicity below the Neel temperature of 8.2(5) K, arising from competing antiferromagnetic nearest-neighbor (J(nn)) and next-nearest-neighbor (J(nnn)) intrachain spin-exchange interactions. Experimental and theoretical results indicate that the ratio J(nn)/J(nnn) is close to 2, putting CuCrO4 in the vicinity of the Majumdar-Ghosh point.

【 授权许可】

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