Phase coexistence, magnetic inhomogeneity, and disorder in the charge-ordered state of Pr2/3Ca1/3MnO3

被引：39

作者：

Frontera, C

García-Muñoz, JL

Llobet, A

Respaud, M

Broto, JM

Lord, JS

Planes, A

机构：

[1] CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain

[2] Lab Louis Neel, F-38042 Grenoble 9, France

[3] INSA, Complexe Sci Rangueil, SNCMP, F-31077 Toulouse, France

[4] INSA, Complexe Sci Rangueil, LPMC, F-31077 Toulouse, France

[5] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[6] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, Catalonia, Spain

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.62.3381

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coexistence of ferromagnetic metallic and antiferromagnetic charge-ordered (CO) States in Pr2/3Ca1/3MnO3 has been investigated using zero-field muon spin relaxation, neutron diffraction, calorimetric, and magnetic measurements. Calorimetric data evidence a high degree of disorder below the CO transition. The data are consistent with large antiferromagnetic (AFM) CO regions containing structural and magnetic inhomogeneities densely scattered. Below the charge order temperature (T(CO)approximate to 220 K) the dominant relaxation mechanism of the muon polarization is based on ferromagnetic Mn-Mn correlations and the spin-lattice relaxation rate is peaked at T-C instead of T-N. The results agree with a spatial distribution of ferromagnetic and AFM regions strongly interpenetrated. The presence of local magnetic order in the whole sample is only achieved just below T(C)approximate to 120 K.

引用

页码：3381 / 3388

页数：8

共 28 条

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