TY - GEN
T1 - Magnetic and transport properties of Ni doped Pr0.5Ca 0.5Mn1.xNixO3-8 manganites
AU - Damari, L.
AU - Pelleg, J.
AU - Gorodetsky, G.
AU - Korn, C.
AU - Markovich, V.
AU - Shames, A.
AU - Wu, X.
AU - Mogilyansky, D.
AU - Fita, I.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - Structural, magnetic and transport properties of Pro0.5Ca 0.5MnO1-xNixO3 (x =0, 0.04, 007, 0.1) series have been investigated. The substitution of Mn ions by Ni induces drastic changes in the magneto-transport properties of Pr0.5Ca 0.5MnO3. 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=O.l0. 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.
AB - Structural, magnetic and transport properties of Pro0.5Ca 0.5MnO1-xNixO3 (x =0, 0.04, 007, 0.1) series have been investigated. The substitution of Mn ions by Ni induces drastic changes in the magneto-transport properties of Pr0.5Ca 0.5MnO3. 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=O.l0. 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.
UR - http://www.scopus.com/inward/record.url?scp=70450128337&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:70450128337
SN - 9781615673841
T3 - Materials Research Society Symposium Proceedings
SP - 75
EP - 80
BT - Materials Research Society Symposium Proceedings - Magnetic Nanostructures by Design
T2 - Magnetic Nanostructures by Design
Y2 - 1 December 2008 through 5 December 2008
ER -