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Giant Magnetic Entropy Change in Manganese Perovskites near Room Temperature |
| ZHONG Wei1;CHEN Wei2;WANG Jin-Hui1;DU You-Wei1 |
| 1National Laboratory of Solid State Microstructures,
Nanjing University, Nanjing 210093
2Department of Physics, Hebei Normal University, Shijiazhuang 050091
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| Cite this article: |
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ZHONG Wei, CHEN Wei, WANG Jin-Hui et al 2001 Chin. Phys. Lett. 18 1114-1116 |
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Abstract A large magnetic entropy change about twice as high as that of pure gadolinium metal near room temperature has been discovered in manganese perovskites La0.837Ca0.098Na0.038Mn0.987O3.00(8.3 J.kg-1.K-1, at 256K) and La0.822Ca0.096K0.043Mn0.974O3.00 (6.8 J.kg-1.K-1, at 265 K) under a magnetic field of 1.5 T. This phenomenon indicates that manganese perovskites have potential applications for magnetic refrigerants in an extended temperature range even near room temperature.
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| Keywords:
75.30.Sg
82.80.-d
81.05.Mh
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Published: 01 August 2001
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| PACS: |
75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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82.80.-d
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(Chemical analysis and related physical methods of analysis)
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81.05.Mh
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(Cermets, ceramic and refractory composites)
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