DocumentCode :
3560122
Title :
Magnetic and Magnetoresistive Properties of Pr 
Ca 
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 Pr0.7Ca0.3CoO3 and Pr0.5Ca0.5CoO3 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; Pr0.5Ca0.5CoO3; Pr0.7Ca0.3CoO3; 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
Link To Document :
