Magnetization distribution in the tetragonal Ba(Fe1-xCox)(2)As-2, x=0.066 probed by polarized neutron diffraction

Thumbnail Image
Prokeš, K.
Gukasov, A.
Argyriou, D. N.
Bud’ko, Sergey
Kreyssig, Andreas
Goldman, Alan
Major Professor
Committee Member
Journal Title
Journal ISSN
Volume Title
Canfield, Paul
Distinguished Professor
Research Projects
Organizational Units
Organizational Unit
Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

Organizational Unit
Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
Journal Issue
Is Version Of

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.


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.

Subject Categories
Sat Jan 01 00:00:00 UTC 2011