Magnetoresistance effect in the fluctuating-valence BaSmFe_(2)O_(5+w) system
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2000
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Mcode
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Language
en
Pages
1683-1685
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APPLIED PHYSICS LETTERS, Volume 77, issue 11
Abstract
The occurrence of negative magnetoresistance (MR) in semiconductive BaSmFe2O5+w double-perovskite samples is demonstrated. A peak in the MR value was observed at the Verwey–type transition temperature. The transition signifies the charge separation of the Fe2.5+ fluctuating mixed valence state into high-spin Fe2+ and Fe3+. The samples were ferrimagnetic with a Curie temperature of ∼710 K. Upon oxidizing/reducing the samples the size of the MR peak and the temperature at which the peak occurred varied. The largest MR value observed was 1.4% at 7 T.Description
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superconductor
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Citation
Nakamura , J , Linden , J , Karppinen , M & Yamauchi , H 2000 , ' Magnetoresistance effect in the fluctuating-valence BaSmFe_(2)O_(5+w) system ' , Applied Physics Letters , vol. 77 , no. 11 , pp. 1683-1685 . https://doi.org/10.1063/1.1310170