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Magnetic and Electronic Transport Properties of Single Crystal La0.64Pb0.36MnO3

Published online by Cambridge University Press:  10 February 2011

Jihui Yang ,
Siqing Hu ,
Ctirad Uher ,
P. D. Han  and
D. A. Payne
Jihui Yang
Affiliation:
Department of Physics, University of Michigan, Ann Arbor, MI 48109
Siqing Hu
Affiliation:
Department of Physics, University of Michigan, Ann Arbor, MI 48109
Ctirad Uher
Affiliation:
Department of Physics, University of Michigan, Ann Arbor, MI 48109
P. D. Han
Affiliation:
Department of Material Science and Engineering Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL 61801
D. A. Payne
Affiliation:
Department of Material Science and Engineering Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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Abstract

We studied the magnetic and electronic transport properties of a single crystal sample of La0.64Pb0.36MnO3 in the temperature range 5 K to 350 K and magnetic field up to 5.5 T. A magnetic transition is found at 210 K. The single crystal sample is ferromagnetic below the transition temperature (Tc) and becomes paramagnetic at temperatures T > Tc. Magnetization measurements along three different orthorhombic crystal axes show no significant difference. The magnetoresistance approaches a maximum value of about -60% at Tc in 5 T magnetic field strength and has qualitatively different field dependence below and above Tc. The scaling behavior between resistivity and magnetic moment is examined for temperatures both below and above the transition. A low temperature (T<15 K) dp / dT < 0 effect is attributed to possible quantum tunneling of carriers between neighbouring distortions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 494: Symposium V – Science & Technology of Magnetic Oxides , 1997 , 317
Copyright
Copyright © Materials Research Society 1998

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References

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