Large room-temperature tunneling magnetoresistance effect in Ba2Fe1.1Mo0.9O6

Wang, Zhong; Liu, W.; Au, Chak Tong; Lu, Linfeng; Du, You Wei

doi:10.1016/j.jmmm.2006.01.073

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Since 2004, Zhong et al [89][90][91][92][93] have conducted systematic studies of the structural, magnetic, and electrical properties of double-perovskite A 2 FeMoO 6 (A = Sr, Ba). Generally, the synthesis route most commonly employed for the A 2 FeMoO 6 phase is the conventional solid-state reaction method that involves the firing of mechanically mixed powder precursors in a flow of H 2 /Ar or H 2 /N 2 gas at 900-1200 • C. The drawback of this method is that a sample with a high degree of Fe/Mo order is not easily obtainable due to the partial evaporation of constituent metals during the long heating periods.…”

Section: Type Ordered Double-perovskite Oxidesmentioning

confidence: 99%

Review of magnetocaloric effect in perovskite-type oxides

Wang¹,

Au²,

Du³

2013

Chinese Phys. B

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We survey the magnetocaloric effect in perovskite-type oxides (including doped ABO 3 -type manganese oxides, A 3 B 2 O 7 -type two-layered perovskite oxides, and A 2 B B O 6 -type ordered double-perovskite oxides). Magnetic entropy changes larger than those of gadolinium can be observed in polycrystalline La 1−x Ca x MnO 3 and alkali-metal (Na or K) doped La 0.8 Ca 0.2 MnO 3 perovskite-type manganese oxides. The large magnetic entropy change produced by an abrupt reduction of magnetization is attributed to the anomalous thermal expansion at the Curie temperature. Considerable magnetic entropy changes can also be observed in two-layered perovskites La 1.6 Ca 1.4 Mn 2 O 7 and La 2.5−x K 0.5+x Mn 2 O 7+δ (0 < x < 0.5), and double-perovskite Ba 2 Fe 1+x Mo 1−x O 6 (0 ≤ x ≤ 0.3) near their respective Curie temperatures. Compared with rare earth metals and their alloys, the perovskite-type oxides are lower in cost, and they exhibit higher chemical stability and higher electrical resistivity, which together favor lower eddy-current heating. They are potential magnetic refrigerants at high temperatures, especially near room temperature.

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