Low temperature heat capacity of Nd2/3Ca1/3MnO3 and (Nd0.9Y0.1)2/3Ca1/3MnO3 manganites: transformation of the Schottky-like anomaly

被引：5

作者：

Fertman, E. ^{[1
]}

Beznosov, A. ^{[1
]}

Desnenko, V. ^{[1
]}

Kajnakova, M. ^{[2
,3
]}

Feher, A. ^{[2
,3
]}

机构：

[1] B Verkin Inst Low Temp Phys & Engn, 47 Lenin Ave, UA-61164 Kharkov, Ukraine

[2] PJSU, Ctr Low Temp Phys, Fac Sci, Kosice 04154, Slovakia

[3] SAS, IEP, Kosice 04154, Slovakia

来源：

25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM | 2009年 / 150卷

关键词：

MAGNETIC-PROPERTIES; DIFFRACTION;

D O I：

10.1088/1742-6596/150/4/042031

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Effect of Y-doping on interactions in the spin system of the colossal magnetoresistance compound Nd2/3Ca1/3MnO3 has been studied by the thermal relaxation heat capacity and neutron diffraction techniques in the 2 - 30 K temperature range. In 5 K temperature region a broadened Schottky-like specific heat anomaly C-Sch(T) has been found both in the present Nd2/3Ca1/3MnO3 and in the doped (Nd0.9Y0.1)(2/3)Ca1/3MnO3 compounds. The experimental data were successfully fitted by a set of three two-level Schottky contributions, implying a broadening of the exited level in the system with randomly distributed Y ions. Replacement of 10% Nd ions by nonmagnetic Y ions leads to the about 10% enlargement of the splitting of the ground state doublet of Nd3+ ion.

引用

页数：4

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