Published August 2013 | Version v1
Journal article Metadata-only

Electron paramagnetic resonance studies on manganite Pr0.5Sr0.5Mn1-xGaxO3 (x=0 and 0.05)

Creators

  • 1. Nanjing University of Aeronautics and Astronautics, Department of Applied Physics, Nanjing (China)
  • 2. Chinese Academy of Sciences, High Magnetic Field Laboratory, Hefei (China)
  • 3. China Jiliang University, Department of Material Engineering, Hangzhou (China)
  • 4. Zhejiang University of Technology, Institute of Magnetic and Electronic Materials, College of Chemical Engineering and Materials Science, Hangzhou (China)
  • 5. University of Science and Technology of China, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei (China)

Description

In this paper, we present the investigations of electron paramagnetic resonance on perovskite manganite Pr0.5Sr0.5MnO3 and Ga-doped Pr0.5Sr0.5Mn0.95Ga0.05O3. The temperature dependent paramagnetic resonance spectra parameters (effective g-factor, peak-to-peak linewidth ΔHpp and double integrated intensities) have been used to study the paramagnetic spin correlations and spin dynamics. The gradual increase of effective g-factor is attributed to the presence of orbital ordering above TC. The model fittings of temperature dependent double integrated intensities reveal Arrhenius law is appropriate for describing Pr0.5Sr0.5Mn0.95Ga0.05O3 instead of Pr0.5Sr0.5MnO3 system. As for Pr0.5Sr0.5MnO3, the broadening of linewidth with the temperature increase origins from the contribution of small polaron hopping in the PM regime. However, as for Pr0.5Sr0.5Mn0.95Ga0.05O3, the broadening of EPR linewidth can be understood with the spin-lattice relaxation mechanism. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1007/s00339-012-7413-5

Additional details

Identifiers

DOI
10.1007/s00339-012-7413-5;

Publishing Information

Journal Title
Applied Physics. A, Materials Science and Processing
Journal Volume
112
Journal Issue
2
Journal Page Range
p. 397-402
ISSN
0947-8396
CODEN
APAMFC

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
44093738
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ARRHENIUS EQUATION; CORRELATIONS; ELECTRON SPIN RESONANCE; EXPERIMENTAL DATA; GALLIUM OXIDES; LANDE FACTOR; LINE BROADENING; LINE WIDTHS; MAGNETIC SUSCEPTIBILITY; MANGANESE OXIDES; PRASEODYMIUM OXIDES; SPECTRA; SPIN ORIENTATION; STRONTIUM OXIDES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; DATA; DIMENSIONLESS NUMBERS; EQUATIONS; GALLIUM COMPOUNDS; INFORMATION; MAGNETIC PROPERTIES; MAGNETIC RESONANCE; MANGANESE COMPOUNDS; NUMERICAL DATA; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PRASEODYMIUM COMPOUNDS; RARE EARTH COMPOUNDS; RESONANCE; STRONTIUM COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS