Relationship between colossal magnetoresistance and giant magnetostriction at Curie point in Sm0.55Sr0.45MnO3статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The close relationship between magnetic, transport and elastic properties in Sm0.55Sr0.45 MnO3 compound is found. At Curie point T-c = 126 K we have observed a large volume contraction DeltaV/V approximate to 0.1%, an abrupt minimum in the temperature dependence of negative volume magnetostriction omega (T) and a maximum in the temperature dependence of resistivity rho (T). We have obtained giant negative volume magnetostriction omega approximate to - 5 x 10(-4) in a relatively low magnetic field B = 0.9 T, which is accompanied by a colossal negative magnetoresistance (CMR) equal to 44% in the same magnetic field. These properties are explained by a magnetic two-phase state. (C) 2000 Elsevier Science B.V. All rights reserved.