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Magnetic entropy change and colossal magnetoresistance effect in the layered perovskite La1.34Sr1.66Mn2O7

Authors :
Zeyu Zhang
Yi Long
Guohui Cao
Aihua Wang
Yang Liu
Source :
Solid State Communications. 130:293-296
Publication Year :
2004
Publisher :
Elsevier BV, 2004.

Abstract

Magnetocaloric and electronic properties of the layered perovskite La1.34Sr1.66Mn2O7 manganese oxide have been investigated. Broadening of the magnetic entropy change peak was observed above Curie temperature (Tc=118 K), which can be associated with the existence of two-dimensional short-range magnetic order in the bilayered perovskite. There is an additional reinforcement of the magnetization in a narrow range under Tc when magnetic field is above ∼2 T, leading to a positive magnetic entropy change. It is noticeable that a wide peak of magnetoresistance (MR ∼66%) near Tc as well as two field-dependent peaks in R–T curves was found in our sample.

Details

ISSN :
00381098
Volume :
130
Database :
OpenAIRE
Journal :
Solid State Communications
Accession number :
edsair.doi...........d6a743c53e0e74fd307d19722da1c88f
Full Text :
https://doi.org/10.1016/j.ssc.2003.12.037