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Magnetic and Transport Properties of Ni Doped Pr0.5Ca0.5Mn1-xNixO3-δ

Published online by Cambridge University Press:  15 March 2011

L. Damari ,
J. Pelleg ,
G. Gorodetsky ,
C. Korn ,
V. Markovich ,
A. Shames ,
X. Wu ,
D. Mogilyansky  and
I. Fita
L. Damari
Affiliation:
Materials Engineering Department, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
J. Pelleg
Affiliation:
Materials Engineering Department, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
G. Gorodetsky
Affiliation:
Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
C. Korn
Affiliation:
Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
V. Markovich
Affiliation:
Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
A. Shames
Affiliation:
Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
X. Wu
Affiliation:
Department of Physics, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
D. Mogilyansky
Affiliation:
Applied Research Institute, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
I. Fita
Affiliation:
Donetsk Institute for Physics & Technology, 83114 Donetsk, Ukraine
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Abstract

Structural, magnetic and transport properties of Pr0.5Ca0.5Mn1-xNixO3 (x =0, 0.04, 0.07, 0.1) series have been investigated. The substitution of Mn ions by Ni induces drastic changes in the magneto-transport properties of Pr0.5Ca0.5MnO3. The physical behavior depends drastically on O stoichiometry. For the low Ni doping x=0.04, 0.07, spin glass configuration is rather favored than ferromagnetism; while for x=0.10, the ferromagnetic phase is significantly suppressed. Pronounced irreversibility between zero-field cooled (ZFC) and field cooled (FC) magnetization and a kink in the ZFC curve observed for x=0.04 and 0.07 are indicative of spin-glass-like state. Applied hydrostatic pressure of about 10 kbar reduces the temperature of charge ordering in an x=0 sample by about 10 K indicating a pressure induced suppression of the Jahn-Teller distortions and of the electron-phonon coupling. Electron magnetic resonance (EMR) unambiguously evidences appearance of FM phase in Ni doped manganites. Temperature dependence of EMR spectra parameters allow us to speculate on the effect of magnetic inhomogeneities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1118: Symposium K – Magnetic Nanostructures by Design , 2008 , 1118-K07-02
Copyright
Copyright © Materials Research Society 2009

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References

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