Effect of co-doping of donor and acceptor impurities in the ferromagnetic semiconductor Zn1―xCrxTe studied by soft x-ray magnetic circular dichroism
作者： Ishikawa K , Kuroda S , Lin Hj , Fujimori A , Zhang K
DOI: 10.1088/0953-8984/23/17/176002
关键词:
摘要: We have performed x-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) studies of the diluted ferromagnetic semiconductor Zn(1-x)Cr(x)Te doped with iodine (I) or nitrogen (N), corresponding to electron hole doping, respectively. From shape Cr 2p peak in XAS spectra, it was concluded that ions undoped, I-doped lightly N-doped samples are divalent (Cr(2+)), while Cr(2+) trivalent (Cr(3+)) coexist heavily sample. This result indicates atoms act as acceptors but holes located on ions. In field dependence XMCD signal at edge, behaviors were observed I-doped, samples, ferromagnetism considerably suppressed sample, which is consistent results magnetization measurements.
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