Site-Selective Determination of Magnetic Helices in BaTiCoFe{sub 10}O{sub 19} by Resonant Magnetic Scattering

Journal Article · Wed Jun 23 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3463353· OSTI ID:21410356

Okube, Maki; Kaneko, Yuhei; Ohsawa, Seiji; Sasaki, Satoshi ^[1]; Toyoda, Takeshi ^[2]; Mori, Takeharu ^[3]

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1. Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta 4259, Yokohama 226-8503 (Japan)
2. Industrial Research Institute of Ishikawa, Kuratsuki 2-1, Kanazawa 920-8203 (Japan)
3. Photon Factory, Institute of Materials Structure Science, KEK, Oho 1-1, Tsukuba 305-0801 (Japan)

Synchrotron radiation intensity measurements were made for single crystals of ferrimagnetic BaTiCoFe{sub 10}O{sub 19} at the BL-6C(3A) beamline of the Photon Factory. The resonant x-ray magnetic scattering (RXMS) method at the Fe K edge makes it possible to determine the magnetic crystal structure, having the magnetic helices for Fe ions in tetrahedral 4f{sub 1}, bipyramidal 2b, and octahedral 2a, 4f{sub 2} and 12k sites. Based on the information on x-ray magnetic circular dichroism (XMCD) and a resonant magnetic scattering factor f''{sub m} ( = 0.23) estimated from BaFe{sub 12}O{sub 19} at E = 7128.2 eV, the magnetic structures have been determined from an asymmetrical ratio {Delta}R (Y{sup +}-Y{sup -})/(Y{sup +}+Y{sup -}), where Y{sup +} and Y{sup -} are scattering intensities for left- and right-circular polarizations, respectively. Spin orientations were estimated in the least-squares procedure to minimize a residual factor of {Sigma}({Delta}R{sub obs}-{Delta}R{sub calc}){sup 2}. The canting angles estimated in this study are 180 deg., 19 deg., 118 deg., 180 deg. and 65 deg. for the magnetic moments of Fe ions in 4f{sub 1}, 2b, 2a, 4f{sub 2} and 12k sites, respectively.

• OSTI ID: 21410356
• Journal Information: AIP Conference Proceedings, Vol. 1234, Issue 1; Conference: SRI 2009: 10. international conference on radiation instrumentation, Melbourne (Australia), 27 Sep - 2 Oct 2009; Other Information: DOI: 10.1063/1.3463353; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
COBALT COMPOUNDS
CRYSTAL STRUCTURE
FERROMAGNETIC MATERIALS
IRON COMPOUNDS
KEK PHOTON FACTORY
LEAST SQUARE FIT
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
MONOCRYSTALS
PHOTONS
POLARIZATION
SCATTERING
SPIN ORIENTATION
SYNCHROTRON RADIATION
SYNCHROTRON RADIATION SOURCES
TITANIUM COMPOUNDS
X RADIATION
YTTRIUM IONS
ALKALINE EARTH METAL COMPOUNDS
BOSONS
BREMSSTRAHLUNG
CHARGED PARTICLES
CRYSTALS
DICHROISM
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
IONIZING RADIATIONS
IONS
MAGNETIC MATERIALS
MASSLESS PARTICLES
MATERIALS
MATHEMATICAL SOLUTIONS
MAXIMUM-LIKELIHOOD FIT
NUMERICAL SOLUTION
ORIENTATION
RADIATION SOURCES
RADIATIONS
TRANSITION ELEMENT COMPOUNDS