Composition dependence of magnetocaloric effect in Sm1-xSrxMnO3 (x = 0.3-0.5)

A. Rebello; R. Mahendiran

doi:10.1063/1.3040698

Composition dependence of magnetocaloric effect in Sm1-xSrxMnO3 (x = 0.3-0.5)

Materials Science 2009-11-13 v1

Authors: A. Rebello , R. Mahendiran

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Abstract

We investigated magnetic and magnetocaloric properties in Sm1-xSrxMnO3 (x = 0.30-0.5). We report a magnetic field driven first-order metamagnetic transition in the paramagnetic state in x = 0.4 and 0.5 and a second-order transition in x = 0.3. The highest magnetic entropy (-Sm = 6.2 J/kgK for H = 5 T at T = 125 K) that occurs in x = 0.4 is associated with the metamagnetic transition resulting from the field-induced growth and coalescence of ferromagnetic nano clusters preexisting in the paramagnetic state. Our results suggest that manganites with intrinsic nanoscale phase separation can be exploited for magnetic refrigeration.

Keywords

magnetocaloric effect manganites metamagnetic transition magnetic entropy nanoscale phase separation magnetic refrigeration

Cite

@article{arxiv.0810.4212,
  title  = {Composition dependence of magnetocaloric effect in Sm1-xSrxMnO3 (x = 0.3-0.5)},
  author = {A. Rebello and R. Mahendiran},
  journal= {arXiv preprint arXiv:0810.4212},
  year   = {2009}
}

Comments

14 pages, 5 figures

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