Synthesis and characterization of double perovskites Sr2FeMo6 (M = Mo, W)

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題名:	Synthesis and characterization of double perovskites Sr2FeMo6 (M = Mo, W)
作者:	Chan TS Liu RS Guo GY Huang CY
貢獻者:	材料所
關鍵詞:	magnetoresistance half-metallic antiferromagnetic Sr2FeMoO6 Sr2FeWO6
日期:	2003
上傳時間:	2009-11-30 11:31:01 (UTC+8)
摘要:	We have investigated the magnetic and magnetotransport properties of monophasic double perovskites Sr2FeMO6 (M = Mo, W). Magnetic measurements indicate that SFMO is a ferromagnet and SFWO is an antiferromagnet with T-N = 35 K at H = 5 T. Large magnetoresistance ratio (MR) of similar to22% (H = 3 T) at room temperature (RT) was observed in the SFWO compound. However, the SFMO compound did not show any significant MR even at high fields and RT (MR similar to 1%; H = 3 T and 300 K). The changes observed by physical measurements are supported by band structure calculations to explain the interaction between the 3d(Fe), 4d(Mo) and 5d(W) orbitals of transition metal ions and oxygen ions.
關聯:	INTERNATIONAL JOURNAL OF MODERN PHYSICS B Volume: 17 Issue: 18-20 Pages: 3500-3502 Part: Part 2
顯示於類別:	[化學工程與材料工程學系暨碩士班] 期刊論文

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