Electronic structure and magnetism of CaMn_1-xRu_xO₃ thin films

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• 作者：Kota Terai ; Kenji Yoshii ; Yukiharu Takeda ; Shin-ichi Fujimori ; Yuji Saitoh ; Kenji Ohwada ; Toshiya Inami ; Tetsuo Okane ; Masashi Arita ; Kenya Shimada ; Hirofumi Namatame ; Masaki Taniguchi ; Keisuke Kobayashi ; Masaki Kobayashi ; Atsushi Fujimori
• 关键词： ; none ; color ; black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TJJ-4M8763X-Y&_mathId=mml13&_pii=S0304885306014508&_issn=03048853&_acct=C000047645&_version=1&_userid=899436&md5=3ad78f8ae2cb2d8df1392882dc
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：310
• 期：2, Part 2
• 页码：1070-1072
• 全文大小：128 K

文摘

We have studied the electronic and magnetic properties of epitaxially grown CaMn_1-xRu_xO₃ (x=1.0, 0.5) thin films by X-ray magnetic circular dichroism (XMCD) and hard X-ray photoemission spectroscopy (HXPES). The XMCD studies indicated that the spin moments of Mn and Ru are aligned in the opposite directions. The HXPES spectra indicated the Ru 4d states at around the Fermi edge (E_F) and the Mn 3d states below E_F. From these results, we propose that the localized Mn 3d t_2g states and the itinerant Ru 4d t_2g band are antiferromagnetically coupled and give rise to ferromagnetism, in analogy with the mechanism proposed for the double perovskite oxides such as Sr₂FeMoO₆.