Magnetocaloric properties of La0.7Ca0.3Mn16O3 and La0.7Ca0.3Mn18O3 manganites and their "sandwich"

被引：36

作者：

Aliev, A. M. ^{[1
]}

Gamzatov, A. G. ^{[1
]}

Kamilov, K. I. ^{[1
,2
]}

Kaul, A. R. ^{[3
]}

Babushkina, N. A. ^{[4
]}

机构：

[1] RAS, Amirkhanov Inst Phys Daghestan Sci Ctr, Makhachkala 367003, Russia

[2] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia

[3] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

[4] Russian Res Ctr, IV Kurchatov Atom Energy Inst, Inst Mol Phys, Moscow 123182, Russia

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 17期

关键词：

LA0.7CA0.3MNO3;

D O I：

10.1063/1.4761953

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of O-16 -> O-18 isotope substitution on specific heat and magnetocaloric effect of polycrystalline La0.7Ca0.3MnO3 manganite is studied. Mainly the effect of isotope substitution for the specific heat and magnetocaloric effect is only the reduction of temperatures of anomalies. Delta T-ad values at magnetic field change Delta H = 18 kOe are equal to Delta T-ad = 2.41K and 2.60K for (La0.7Ca0.3MnO3)-O-16 (LCMO16) and (La0.7Ca0.3MnO3)-O-18 (LCMO18), respectively. The sandwich of the LCMO16 and LCMO18 samples was produced for direct measurement of Delta T-ad. The use of sandwich from materials with near similar magnetocaloric properties increases the relative cooling power by about 20%. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4761953]

引用

页数：4

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