MAGNETIC CIRCULAR-DICHROISM OF ZINC-BLENDE-PHASE MNTE

被引：60

作者：

ANDO, K ^{[1
]}

TAKAHASHI, K ^{[1
]}

OKUDA, T ^{[1
]}

UMEHARA, M ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT,IBARAKI 305,JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.46.12289

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Temperature dependence of the magneto-optic effect, i.e., magnetic-circular-dichroism (MCD) spectra, of metastable zinc-blende MnTe films has been investigated. MCD peaks from the GAMMA point of the Brillouin zone as well as from the Mn d-d intra-atomic tranistions were observed. Below 70 K the energy of the GAMMA peak showed a distinct magnetic blueshift accompanying a rapid increase of the MCD intensity. These anomalies reflect the first-order phase transition into the type-III antiferromagnetic-ordering state of a frustrated Heisenberg antiferromagnet. In the antiferromagnetic-ordering state, a larger magneto-optic effects as compared with that in the paramagnetic state was observed. This large magneto-optic effect in the antiferromagnetic-ordering state is related with the sharpening of the optical-absorption spectra.

引用

页码：12289 / 12297

页数：9

共 32 条

[1] GENERALIZATIONS OF THE WEISS MOLECULAR FIELD THEORY OF ANTIFERROMAGNETISM [J].