Metastability and magnetic memory effect in Ni2Mn1.4Sn0.6

被引：77

作者：

Chatterjee, S. ^{[1
]}

Giri, S. ^{[1
]}

Majumdar, S. ^{[1
]}

De, S. K. ^{[2
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India

[2] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.77.012404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetostructural instability in the ferromagnetic shape memory alloy of composition Ni2Mn1.4Sn0.6 is investigated by transport and magnetic measurements. Large negative magnetoresistance is observed around the martensitic transition temperature (90-210 K). Both magnetization and magnetoresistance data indicate that upon the application of an external magnetic field at a constant temperature, the sample attains a field-induced arrested state which persists even when the field is withdrawn. We observe an intriguing behavior of the arrested state that it can remember the last highest field it has experienced. The field-induced structural transition plays the key role for the observed anomaly and the observed irreversibility can be accounted for by the Landau-type free energy model for the first-order phase transition.

引用

页数：4

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