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Please use this identifier to cite or link to this item: http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/793

Title: Room-temperature large magnetocaloric effect in perovskites (La1-xNdx)0.7Sr0.3MnO3
Authors: Nguyen, Hoang Luong
Nguyen, Thi Mai Phuong
Phung, Thu Hien
Hoang, Nam Nhat
Luc, Huy Hoang
Nguyen, Chau
Nguyen, Hoang Hai
Keywords: Magnetocaloric effect
perovskites
manganites
Issue Date: 2008
Publisher: ĐHQGHN
Citation: VNU Journal of Science, Mathematics - Physics 24 (2008) 30-35
Abstract: Study of the effect of Nd substitution for La on magnetocaloric effect (MCE) of polycrystalline perovskites (La1-xNdx)0.7Sr0.3MnO3 (x = 0.0, 0.2 , 0.4, 0.6, 0.8, 1.0 ) is presented. Large MCE is observed in all samples. The presence of Nd affects to both maximum magnetic entropy change, | Sm|max, and Curie temperature, TC. | Sm|max slightly reduces with low content and increases with high content of Nd and gets maximum value of 4.83 J/kg.K for x = 0.8. TC of the samples determined from the thermomagnetic curves somewhat increases from 346 K for x = 0.0 to 350 K for x = 0.2, then decreases to 235 K for x = 1.0. The sample with x = 0.4 exhibiting the largest value of 74 J/kg for the relative cooling power among the studied samples has TC = 325 K, i.e. higher than room temperature. Our studied samples are promising materials for magnetic refrigerants in the room-temperature region.
Description: VNU Journal of Science, Mathematics - Physics. Vol. 24 (2008), No 1, P. 30-35
URI: http://hdl.handle.net/123456789/793
ISSN: 0866-8612
Appears in Collections:Vol. 24, No.1

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