Weak Ferromagnetism and Magnetoresistance in Sm1/3 Sr2/3 FeO2.95

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The temperature dependence of the magnetization (ac and dc) indicate that Sm1/3Sr2/3FeO3-d undergoes an antiferromagnetic transition at TN = 150 K. In low applied fields, the zero field cooled (ZFC) and field cooled (FC) magnetization below TN exhibit a hysteretic behavior. This behavior is suppressed by high applied field. The ac susceptibility for Sm1/3Sr2/3FeO2.95 shows that there is a clear frequency dependence developing below TN. The relusts of both ac and dc measurements suggest that the antiferromagnetic long-range order coexist with ferromagnetic correlations. Field-dependent resistivity versus temperature measurements reveal the existence of a magnetoresistance (MR) in the temperature below TN. The appearance of some ferromagnetic component within an antiferromagnetically ordered state may be responsible for the MR at low temperature.

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Periodical:

Key Engineering Materials (Volumes 280-283)

Edited by:

Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li

Pages:

461-464

DOI:

10.4028/www.scientific.net/KEM.280-283.461

Citation:

Y.M. Zhao and H.J. Quan, "Weak Ferromagnetism and Magnetoresistance in Sm1/3 Sr2/3 FeO2.95", Key Engineering Materials, Vols. 280-283, pp. 461-464, 2005

Online since:

February 2007

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$35.00

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