Metastability and magnetic memory effect in Ni-Mn-Sn alloy

S. Chatterjee; S. Giri; S. Majumdar; S. K. De

doi:10.1103/PhysRevB.77.012404

Metastability and magnetic memory effect in Ni-Mn-Sn alloy

Strongly Correlated Electrons 2009-11-13 v1 Materials Science

Authors: S. Chatterjee , S. Giri , S. Majumdar , S. K. De

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Abstract

Magneto-structural instability in the ferromagnetic shape memory alloy of composition Ni $_2$ Mn $_{1.4}$ Sn $_{0.6}$ 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at a constant temperature, the sample attains a field-induced arrested state which persists even when the field is withdrawn.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 by the Landau-type free energy model for the first order phase transition.

Keywords

magnetocaloric effect magnetic structure magnetization

Cite

@article{arxiv.0802.1102,
  title  = {Metastability and magnetic memory effect in Ni-Mn-Sn alloy},
  author = {S. Chatterjee and S. Giri and S. Majumdar and S. K. De},
  journal= {arXiv preprint arXiv:0802.1102},
  year   = {2009}
}

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