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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 31, No. 57 >

La 0.7 Ca 0.3 MnO 3薄膜の磁気抵抗に及ぼすFeドーピングの効果

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Title: La 0.7 Ca 0.3 MnO 3薄膜の磁気抵抗に及ぼすFeドーピングの効果
Other Titles: Fe Doping Effects on Magnetoresistance of La 0.7 Ca 0.3 MnO 3 Thin Film
Authors: 藤島, 友之 / S.B.Ogale / T.Venkatesan 他
Authors (alternative): Fujishima, Tomoyuki / S.B.Ogale / T.Venkatesan
Issue Date: Jul-2001
Citation: 長崎大学工学部研究報告 Vol.31(57) p.47-50, 2001
Abstract: Epitaxial thin films of La_<0.7>Ca_<0.3>Mn_<1-x>Fe_xO_3 (x=0,0.05 and 0.10) are grown on (001) LaAlO_3 substrates by pulsed laser deposition. The resistivity (ρ), the peak resistivity temperature (Tp), and the temperature coefficient of resistance (TCR=1/R dR/dT) are examined, and compared for the undoped and Fe-doped cases. Fe-doping depresses the Tp value significantly; from &acd;266K for the undoped film to &acd;181K for x=0.10 film, with a concomitant decrease in magnetization, reflecting extended influence of the dopant. The TCR shows a dramatic increase from &acd;11%/K for the undoped film to &acd;16%/K in the Fe-doped films. The saturation value of magnetization (M) shows a drastic decrease from 600emu/cm^3 for the undoped film to 300 emu/cm^3 for the 10% Fe-doped film. The Magnetoresistance (MR) shows slightly increase from 85% for the undoped film to 98% for the 10% Fe-doped film.
URI: http://hdl.handle.net/10069/5155
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 31, No. 57

Citable URI : http://hdl.handle.net/10069/5155

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