Field-induced orbital order-disorder transition in an A-type antiferromagnetic manganite: High-field study of Nd0.45Sr0.55MnO3
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چکیده
Magnetization and magnetoresistance were measured in A-type antiferromagnet Nd0.45Sr0.55MnO3 utilizing pulsed magnetic fields up to 45 T. We have observed a ferromagnetic transition accompanied by a discontinuous decrease of resistivity. The temperature dependence of the resistivity in the ferromagnetic state showed characteristics of a three-dimensional metal. The observed phenomena are explained in terms of simultaneous destruction of the dx22y2 orbital ordering and the A-type antiferromagnetic spin ordering by magnetic field.
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تاریخ انتشار 2001