Peculiarities of magnetic, elastic and transport properties near the Curie temperature in Nd1-xSrxMnO3 manganitesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The close interplay between magnetic, transport and elastic properties in Nd1-xSrxMnO3 (x = 0.33, 0.45) compounds is found. Near the Curie point we have observed: (i) an abrupt minimum on the temperature dependence of negative volume magnetostriction omega (T) (ii) the large volume contraction (DeltaV/V approximate to 0.1% for x = 0.33 compound), (iii) a maximum on the temperature dependence of resistivity rho (T), (iv) a maximum on the temperature dependence of absolute value of negative magnetoresistance. We have obtained large negative volume magnetostriction omega approximate to -10(-4) in a relatively low magnetic field B = 0.9 T and colossal negative magnetoresistance in the same magnetic field in the wide temperature region. These properties are explained by the existence of the conducting magnetic two-phase state in our compounds.