Spin susceptibility and superexchange interaction in the antiferromagnet CuO

Article

关键词: NUCLEAR-QUADRUPOLE RESONANCE;    HIGH-TC SUPERCONDUCTORS;    CUPRIC OXIDE;    NEUTRON-SCATTERING;    MAGNETIC-SUSCEPTIBILITY;    ELECTRONIC-STRUCTURE;    PEIERLS TRANSITION;    CRYSTAL-STRUCTURE;    PHASE-TRANSITION;    ROOM-TEMPERATURE;   

DOI  :  10.1103/PhysRevB.68.224433

来源: SCIE

【 摘 要 】

Experimental evidence for the quasi-one-dimensional (1D) antiferromagnetism of CuO is presented in a framework of Heisenberg model. We have obtained an experimental absolute value of the paramagnetic spin susceptibility of CuO by subtracting the orbital susceptibility separately from the total susceptibility through the Cu-63 NMR shift measurement, and compared directly with the theoretical predictions. The result is best described by a 1D S=1/2 antiferromagnetic Heisenberg model, supporting the speculations and conclusions drawn by other methods. We also present a quantitative reason why CuO is unexpectedly a quasi-1D antiferromagnet in spite of appearing to have 3D structure.

【 授权许可】

Free