TY  - JOUR
AU  - Brown, P.J.
AU  - Chatterji, T.
AU  - Stunault, A.
AU  - Su, Y.
AU  - Xiao, Y.
AU  - Mittal, R.
AU  - Brückel, T.
AU  - Wolf, Th
AU  - Adelmann, P.
TI  - Magnetization distribution in the tetragonal phase of BaFe_2As_2
JO  - Physical review / B
VL  - 82
IS  - 2
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-10677
SP  - 024421
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - We have determined the spatial distribution of the magnetization induced by a field of 9 T in the tetragonal phase of BaFe2As2 using polarized neutron diffraction. Magnetic structure factors derived from the polarization dependence of the intensities of Bragg reflections were used to make a maximum-entropy reconstruction of the distribution projected on the 110 plane. The reconstruction shows clearly that the magnetization is confined to the region around the iron atoms and that there is no significant magnetization associated with either As or Ba atoms. The distribution of magnetization around the Fe atom is significantly nonspherical with a shape which is extended in the < 111 > directions in the projection. These results show that the electrons which give rise to the paramagnetic susceptibility are confined to the Fe atoms their distribution suggests that they occupy 3d t(2g)-type orbitals with approximate to 60% in those of xy symmetry.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000280173800004
DO  - DOI:10.1103/PhysRevB.82.024421
UR  - https://juser.fz-juelich.de/record/10677
ER  -