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High Frequency Magneto-Electrodynamics of La1-xSrxMnO3 Single Crystals

Published online by Cambridge University Press:  10 February 2011

H. Srikanth ,
B. Revcolevschi ,
S. Sridhar ,
L. Pinsard  and
A. Revcolevschi
H. Srikanth
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
B. Revcolevschi
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
S. Sridhar
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
L. Pinsard
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
A. Revcolevschi
Affiliation:
Laboratoire de Chimie des Solides, Université Paris-Sud, 91405 Orsay Cedex, France
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Abstract

The radio frequency (RF) response of La1-xSrxMnO3 single crystals reveal a variety of features associated with the structural, electronic and magnetic properties of the system. The resonance technique operating at ∼ 4 MHz employed in this study is sensitive to small changes in both the magnetic susceptibility and resistivity of the samples. Very sharp changes in frequency are observed at the ferromagnetic (FM) and structural phase transitions in both the metallic (x = 0.175) and insulating (0.125) crystals studied.

In addition to the known transitions identified as FM and orthorhombic distortions, our experiments show rich structures which are not observed in conventional DC magnetization and transport experiments. Our results demonstrate that RF experiments are ideally suited to investigate the complex phase diagram in the manganites.

The colossal frequency change that we observe at the FM transition in the La1-xSrxMnO3 crystals is indicative of the enormous potential for using these materials in high frequency switching applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 494: Symposium V – Science & Technology of Magnetic Oxides , 1997 , 311
Copyright
Copyright © Materials Research Society 1998

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References

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