Anomalous volume expansion in CaRu{sub 0.85}Fe{sub 0.15}O{sub 3}: Neutron powder diffraction and magnetic Compton scattering
- College of Science and Engineering, Aoyama Gakuin University, Fuchinobe, Sagamihara, Kanagawa 157-8572 (Japan)
- Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494 (Japan)
- Department of Materials Structure Science, Graduate University for Advanced Studies, Tsukuba, Ibaraki 305-0801 (Japan)
- National Synchrotron Radiation Research Center, Taiwan, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China)
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo, 679-5198 (Japan)
- Nanoscale Materials Center, National Institute for Materials Science, Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
- Kawazoe Frontier Technologies Co., Ltd., Kuden, Sakae, Yokohama, Kanagawa 931-113 (Japan)
- Faculty of Maritime Sciences, Kobe University, Fukaeminami, Higashinada, Kobe, Hyogo 658-0022 (Japan)
Neutron powder diffraction and magnetic Compton scattering measurements were conducted for ferromagnetic CaRu{sub 0.85}Fe{sub 0.15}O{sub 3} at temperatures between 10 and 300 K. Anomalous volume expansion was observed in the neutron diffraction measurement below the Curie temperature (85 K), and Invar-like behavior was observed below 40 K. However, no structural phase transition was observed down to 10 K. The strong correlation between the volume expansion, {delta}V, and the square magnetization, M{sup 2}, suggests that the anomalous volume expansion is due to the magnetovolume effect that is caused by the occurrence of ferromagnetism. The magnetic Compton scattering experiments revealed the existence of a magnetic moment on Ru and the antiferromagnetic configuration of Fe and Ru moments. The formation of a ferrimagnetic order through the induction of the magnetic moment on the Ru ion is a possible reason for the anomalous volume expansion observed for CaRu{sub 0.85}Fe{sub 0.15}O{sub 3}.
- OSTI ID:
- 20976650
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 75, Issue 2; Other Information: DOI: 10.1103/PhysRevB.75.024414; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CALCIUM COMPOUNDS
COMPTON EFFECT
CURIE POINT
EXPANSION
FERROMAGNETIC MATERIALS
FERROMAGNETISM
MAGNETIC MOMENTS
MAGNETIZATION
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
RUTHENIUM COMPOUNDS
RUTHENIUM IONS
TEMPERATURE DEPENDENCE