Soft X-ray magnetic circular dichroism study of the ferromagnetic spinel-type Cr chalcogenides
Soft X-ray magnetic circular dichroism study of the ferromagnetic spinel-type Cr chalcogenides
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DOI：
10.1016/s0368-2048(00)00332-7
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发表时间：
2001-03
影响因子：
1.9
通讯作者：
A. Kimura;J. Matsuno;J. Okabayashi;A. Fujimori;T. Shishidou;E. Kulatov;T. Kanomata
中科院分区：
文献类型：
--
作者：
A. Kimura;J. Matsuno;J. Okabayashi;A. Fujimori;T. Shishidou;E. Kulatov;T. Kanomata
我们在半导体铁磁体CdCr2Se4和金属铁磁体CuCr2S4和CuCr2Se4的软X射线吸收谱中观察到磁圆二色性（MCD）。Cr 2 p x射线吸收谱和MCD谱表明，尽管Cr 3的形式价态不同，但Cu基Cr硫化物和硒化物中Cr原子的d电子位数与CdCr2 Se4中Cr原子的d电子位数没有太大差别. 5+和Cr3+。Cu2 p MCD谱表明，CuCr2 S4和CuCr2 Se4中Cu位上存在与Cr 3d磁矩反平行排列的小磁矩，这与能带结构计算结果一致.
We have observed magnetic circular dichroism (MCD) in the soft x-ray absorption spectra of the semiconducting ferromagnet CdCr 2 Se 4 and the metallic ferromagnets CuCr 2 S 4 and CuCr 2 Se 4. The Cr 2 p x-ray absorption and MCD spectra show that the d-electron occupancies of the Cr atom in the Cu based Cr sulfide and selenide are not much different from that in the CdCr 2 Se 4 in spite of the different formal valencies Cr 3. 5+ and Cr 3+, respectively. The observed Cu 2 p MCD spectra show the existence of small magnetic moments on the Cu sites which are aligned antiparallel to the Cr 3 d moment in CuCr 2 S 4 and CuCr 2 Se 4, consistent with band-structure calculation.