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小林 正起*; 大木 康弘*; 滝沢 優*; Song, G. S.*; 藤森 淳; 竹田 幸治; 寺井 恒太*; 岡根 哲夫; 藤森 伸一; 斎藤 祐児; et al.
Applied Physics Letters, 92(8), p.082502_1 - 082502_3, 2008/02
被引用回数:12 パーセンタイル:44.67(Physics, Applied)By means of photoemission and X-ray absorption spectroscopy, we have studied the electronic structure of (Ni,Zn,Fe,Ti)O thin films, which exhibits a cluster glass behavior with a spin-freezing temperature of K and photo-induced magnetization (PIM) below . The Ni and Zn ions were found to be in the divalent states. Most of the Fe and Ti ions in the thin films were trivalent (Fe) and tetravalent (Ti), respectively. While Ti doping did not affect the valence states of the Ni and Zn ions, a small amount of Fe ions increased with Ti concentration, consistent with the proposed charge-transfer mechanism of PIM.