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Title: Broadband electron spin resonance in a nanosized La{sub 0.25}Ca{sub 0.75}MnO{sub 3} manganite

The microwave response of a nanogranular La{sub 0.25}Ca{sub 0.75}MnO{sub 3} manganite has been studied by means of broadband electron spin resonance experiments performed in a commercial magnetic properties measurement system magnetometer using two purpose-built probes. The results concur with the hydrodynamic model for spin-glass systems and allow to determine the gyromagnetic ratio and the effective uniaxial magnetic anisotropy constant in a wide range of temperatures. The thermal behavior of both magnitudes provides information about structural transitions and magnetic interactions within the nanosized grains that make the sample. The experiments enable to corroborate the validity of the applied model in this kind of magnetic systems.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, planta 4, 08028 Barcelona (Spain)
  2. (Spain)
  3. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
Publication Date:
OSTI Identifier:
22314555
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; ELECTRON SPIN RESONANCE; GYROMAGNETIC RATIO; HYDRODYNAMIC MODEL; MAGNETIC PROPERTIES; MAGNETOMETERS; MICROWAVE RADIATION; NANOSTRUCTURES; PROBES; SPIN GLASS STATE