脉冲强磁场作用下HgCr $_2$ O $_4$阻挫自旋磁体磁序的光学探测
Optical detection of magnetic orders in HgCr$_2$O$_4$ frustrated spin magnet under pulsed high magnetic fields
摘要：
在高达55 T的脉冲强磁场下对HgCr $_2$ O $_4$粉末样品进行了磁光测量。在磁场中观察到的激子-磁振子-声子光学跃迁谱的强度变化与磁化强度、X射线衍射的晶格畸变和电磁共振的强度变化一致。在完全极化的磁性相之前检测到最后有序相，类似于其它铬尖晶石氧化物ZnCr $_2$ O $_4$和CdCr $_2$ O $_4$。
英文摘要：
A magneto-optical survey was conducted for HgCr$_2$O$_4$ powder samples under pulsed high magnetic fields of up to 55 T. Intensity changes in magnetic fields observed for the exciton-magnon-phonon optical transition spectra coincide well with those of magnetization, lattice distortion from X-ray diffraction, and electron-magnetic resonances. The last-ordered phase was detected prior to the fully polarized magnetic phase, similarly to the other chromium spinel oxide, ZnCr$_2$O$_4$ and CdCr$_2$O$_4$.
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