Magnetic and Magnetoresistive Properties of Pr $_{1 - {\\rm x}}$ Ca $_{\\rm x}$ CoO

Author

Deac, I.G. ; Tetean, R. ; Andreica, D. ; Burzo, E.

Author_Institution

Fac. of Phys., Univ. Babes-Bolyai, Cluj-Napoca

Volume

44

Issue

11

fYear

2008

Firstpage

2922

Lastpage

2925

Abstract

Polycrystalline perovskite Pr_0.7Ca_0.3CoO₃ and Pr_0.5Ca_0.5CoO₃ have been investigated by electrical resistivity, magnetization, ac susceptibility, and mu SR measurements. The magnetic measurements data indicate that the samples have, at low temperatures, similar properties to the frustrated magnets. The muSR measurements, suggest the presence of magnetic clusters at low temperatures. The electrical behavior has the main features of conduction in a phase separated system: it shows negative magnetoresistance and it is controlled by grain-boundary effects.

Keywords

calcium compounds; colossal magnetoresistance; ferromagnetic materials; frustration; grain boundaries; magnetic susceptibility; magnetisation; negative resistance; praseodymium compounds; AC susceptibility; Pr_0.5Ca_0.5CoO₃; Pr_0.7Ca_0.3CoO₃; cobaltites; colossal magnetoresistance; electrical resistivity; ferromagnetism; frustrated magnets; grain-boundary effects; magnetic clusters; magnetic measurements; magnetic properties; magnetization; magnetoresistive properties; negative magnetoresistance; polycrystalline perovskite; Cobalt compounds; magnetic susceptibility; magnetoresistance; transition metal compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2008.2001332

Filename

4717460

Magnetic and Magnetoresistive Properties of Pr Ca CoO

Deac, I.G. ; Tetean, R. ; Andreica, D. ; Burzo, E.

jour

Magnetic and Magnetoresistive Properties of Pr $_{1 - {\\rm x}}$ Ca $_{\\rm x}$ CoO