Site-selective determination of magnetic helices in BaTiCoFe 10O19 by resonant magnetic scattering

Maki Okube, Yuhei Kaneko, Seiji Ohsawa, Takeshi Toyoda, Takeharu Mori, Satoshi Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Synchrotron radiation intensity measurements were made for single crystals of ferrimagnetic BaTiCoFe10O19 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 4f1, bipyramidal 2b, and octahedral 2a, 4f2 and 12k sites. Based on the information on x-ray magnetic circular dichroism (XMCD) and a resonant magnetic scattering factor f″m(=0.23) estimated from BaFe 12O19 at E=7128.2eV, the magnetic structures have been determined from an asymmetrical ratio ΔR=(Y+-Y -)/(Y++Y-), where Y+ and Y - 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 Σ(ΔR obs-ΔRcalc)2. The canting angles estimated in this study are 180°, 19°, 118°, 180° and 65° for the magnetic moments of Fe ions in 4f1, 2b, 2a, 4f2 and 12k sites, respectively.

Original languageEnglish
Title of host publicationSRI 2009 - The 10th International Conference on Synchrotron Radiation Instrumentation
Pages871-874
Number of pages4
DOIs
Publication statusPublished - 2010 Aug 3
Event10th International Conference on Synchrotron Radiation Instrumentation, SRI 2009 - Melbourne, VIC, Australia
Duration: 2009 Sep 272009 Oct 2

Publication series

NameAIP Conference Proceedings
Volume1234
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10th International Conference on Synchrotron Radiation Instrumentation, SRI 2009
CountryAustralia
CityMelbourne, VIC
Period09/9/2709/10/2

Keywords

  • BaTiCoFeO
  • magnetic helices
  • magnetic structure determination
  • resonant x-ray magnetic scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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