Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

2-11-2011

Journal or Book Title

EPL (Europhysics Letters)

Volume

93

Issue

3

First Page

32001

DOI

10.1209/0295-5075/93/32001

Abstract

Polarized neutron diffraction has been performed on a tetragonal Ba(Fe1-xCox)(2)As-2, x=0.066 single crystal under an applied magnetic field of 6 T directed along the [(1) over bar 10] direction to determine the magnetic structure factors of various Bragg reflections. The maximum entropy reconstruction based on bulk magnetization measurements and polarized neutron diffraction data reveal a small induced magnetic moment residing on the 4d Wyckoff site that is occupied by Fe/Co atoms. No significant magnetization density has been found on the Ba and As atomic positions. The small polarizability of Fe/Co sites leads to flipping ratios very close to 1.00. Our data suggest a non-zero orbital contribution to the Fe/Co magnetic form factor in good agreement with recent theoretical and experimental studies.

Comments

This article is published as Prokeš, K., A. Gukasov, D. N. Argyriou, S. L. Bud'ko, P. C. Canfield, A. Kreyssig, and A. I. Goldman. "Magnetization distribution in the tetragonal Ba (Fe1− xCox) 2As2, x= 0.066 probed by polarized neutron diffraction." EPL (Europhysics Letters) 93, no. 3 (2011): 32001. DOI: 10.1209/0295-5075/93/32001. Posted with permission.

Copyright Owner

Europhysics Letters Association

Language

en

File Format

application/pdf

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