Magnetic and magnetotransport properties of GdBaCo2O5+δ:: A high magnetic-field study -: art. no. 214401

被引：73

作者：

Respaud, M

Frontera, C

García-Muñoz, JL

Aranda, MAG

Raquet, B

Broto, JM

Rakoto, H

Goiran, M

Llobet, A

Rodríguez-Carvajal, J

机构：

[1] Inst Natl Sci Appl, LPMC, F-31077 Toulouse, France

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

[3] Univ Malaga, Dept Quim Inorgan Cristalog & Mineral, E-29071 Malaga, Spain

[4] LNCMP, F-31077 Toulouse, France

[5] CNRS, Lab Magnetisme Louis Neel, F-38042 Grenoble 9, France

[6] Ctr Etud Saclay, CEA, CNRS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.87.214401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic, transport. and optical measurements performed on GdBaCo2O5.5 under pulsed magnetic fields up to 35 T have allowed us to determine its complete mu H-o-T phase diagram. A first-order field-induced transition takes place below the Neel point (T(N)approximate to 255 K) which implies the appearance of a ferromagnetic component and steep changes in the conductivity. The ferromagnetic component (0.45+/-0.1) mu (B)/(Co ion) does not appreciably change below T-N. The nature of the high-field ferromagnetic state is discussed in connection with the zero-field ferromagnetic (or ferrimagnetic) phase above T-N.

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页数：7

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