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Magnetotransport properties and magnetocaloric effect in La0.67Ca0.33Mn1 xTMxO3(TM¼Cu, Zn) perovskite manganites / Phung, ThanhPQ

Tác giả : Phung, ThanhPQ

Nhà xuất bản : Elsevier

Năm xuất bản : 2012

Chủ đề : 1. Magnetotransport. 2. Article.

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Tóm tắt :

The magnetic and transport properties of the perovskites La0.67Ca0.33Mn1-xTMxO3 were found to be sufficiently changed with the substitution of Mn-sites by other 3d transition-metal cations (TM¼Cu,Zn; x¼0.15). The values ofTC, TM I, and TCMRwere surveyed when Mn was replaced by Cu and Zn. The magnetic field induced resistivity and magnetic entropy change of these samples showed abrupt changes nearTC(194.2 and 201.5 K for Cu and Zn-doped case respectively) and attained the highest values among the doped cases (up to 20% Cu). The maximum values (obtained at H¼4 kOe) of magnetoresistance ratio (CMR) were 27.8%, and 24.5% and of magnetic entropy change ( DSM)were 3.9 and 3.2 J/kg K for Cu and Zn-doped, respectively

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Viện Tài nguyên và Môi trường - ĐHQGHN
https://repository.vnu.edu.vn/handle/VNU_123/10130