Swift heavy ion irradiation induced magnetism in magnetically frustrated BiMn{sub 2}O{sub 5} thin films
- Department of Physics, Aligarh Muslim University, Aligarh 202002 (India)
- Centre for Materials Science and Engineering, National Institute of Technology, Hamirpur 177005 (India)
- UGC-DAE Consortium for Scientific Research, Indore 452001 (India)
- European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex (France)
- Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP), Campinas 13.083-970, SP (Brazil)
The swift heavy ion (SHI) irradiation induces weak ferrimagnetism (FM) in magnetically frustrated polycrystalline BiMn{sub 2}O{sub 5} thin films. This is manifested from irradiation induced higher energetic configuration that accounts for evolution of the Mn{sup 2+} state in the Mn{sup 3+}/Mn{sup 4+} network. Basically, this is the root of large magnetic moment in the irradiated samples. X-ray diffraction and Raman-scattering data of the samples indicate considerable modifications in the crystal structure after the SHI irradiation. FM in the irradiated samples and magnetically frustrated behavior of the pristine sample is apparent from dc magnetization measurements. Element specific characterizations such as near-edge x-ray absorption fine structure spectroscopy at O K and Mn L{sub 3,2} edges along with x-ray magnetic circular dichroism at Mn L{sub 3,2} edge show the evolution of the Mn{sup 2+} at disbursement of the Mn{sup 4+}. The microscopic origin behind the induced weak FM is found to be the increased orbital moment in the irradiated thin films.
- OSTI ID:
- 21502871
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 17; Other Information: DOI: 10.1103/PhysRevB.82.174432; (c) 2010 The American Physical Society; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
BISMUTH COMPOUNDS
CONFIGURATION
CRYSTAL STRUCTURE
FERRIMAGNETISM
FINE STRUCTURE
HEAVY IONS
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
MAGNETIZATION
MANGANATES
MANGANESE IONS
PHYSICAL RADIATION EFFECTS
POLYCRYSTALS
RAMAN EFFECT
THIN FILMS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTALS
DICHROISM
DIFFRACTION
FILMS
IONS
MAGNETISM
MANGANESE COMPOUNDS
OXYGEN COMPOUNDS
RADIATION EFFECTS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS