Anomalous volume expansion in CaRu{sub 0.85}Fe{sub 0.15}O{sub 3}: Neutron powder diffraction and magnetic Compton scattering

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.75.024414· OSTI ID:20976650

Taniguchi, T; Mizusaki, S; Okada, N; Nagata, Y ^[1]; Mori, K ^[2]; Wuernisha, T; Kamiyama, T ^[3]; Hiraoka, N ^[4]; Itou, M; Sakurai, Y ^[5]; Ozawa, T C ^[6]; Noro, Y ^[7]; Samata, H ^[8]

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1. College of Science and Engineering, Aoyama Gakuin University, Fuchinobe, Sagamihara, Kanagawa 157-8572 (Japan)
2. Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494 (Japan)
3. Department of Materials Structure Science, Graduate University for Advanced Studies, Tsukuba, Ibaraki 305-0801 (Japan)
4. National Synchrotron Radiation Research Center, Taiwan, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China)
5. Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo, 679-5198 (Japan)
6. Nanoscale Materials Center, National Institute for Materials Science, Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
7. Kawazoe Frontier Technologies Co., Ltd., Kuden, Sakae, Yokohama, Kanagawa 931-113 (Japan)
8. 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

Related Subjects

75 CONDENSED MATTER PHYSICS
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