Saito H, Zayets V, Yamagata S, Ando K
NanoElectronics Research Institute, AIST, Tsukuba Central 2, Umezono 1-1-1, Tsukuba Ibaraki 305-8568, Japan.
Phys Rev Lett. 2003 May 23;90(20):207202. doi: 10.1103/PhysRevLett.90.207202. Epub 2003 May 20.
The magnetic and magneto-optical properties of a Cr-doped II-VI semiconductor ZnTe were investigated. Magnetic circular dichroism measurements showed a strong interaction between the sp carriers and localized d spins, indicating that Zn(1-x)Cr(x)Te is a diluted magnetic semiconductor. The Curie temperature of the film with x=0.20 was estimated to be 300+/-10 K, which is the highest value ever reported for a diluted magnetic semiconductor in which sp-d interactions were confirmed. In spite of its high Curie temperature, Zn(1-x)Cr(x)Te film shows semiconducting electrical transport properties.
研究了Cr掺杂的II-VI族半导体ZnTe的磁性和磁光性质。磁圆二色性测量表明，sp载流子与局域d自旋之间存在强相互作用，这表明Zn(1-x)Cr(x)Te是一种稀磁半导体。x = 0.20的薄膜的居里温度估计为300±10 K，这是已报道的确认存在sp-d相互作用的稀磁半导体中的最高值。尽管Zn(1-x)Cr(x)Te薄膜具有较高的居里温度，但它仍表现出半导体的电输运性质。
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