TY  - JOUR
AU  - Frandsen, Benjamin A.
AU  - Gong, Zizhou
AU  - Terban, Maxwell W.
AU  - Banerjee, Soham
AU  - Chen, Bijuan
AU  - Jin, Changqing
AU  - Feygenson, Mikhail
AU  - Uemura, Yasutomo J.
AU  - Billinge, Simon J. L.
TI  - Local atomic and magnetic structure of dilute magnetic semiconductor (Ba , K) (Zn , Mn)$_{2}$ As$_{2}$
JO  - Physical review / B
VL  - 94
IS  - 9
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2016-05536
SP  - 094102
PY  - 2016
AB  - We have studied the atomic and magnetic structure of the dilute ferromagnetic semiconductor system (Ba,K)(Zn,Mn)2As2 through atomic and magnetic pair distribution function analysis of temperature-dependent x-ray and neutron total scattering data. We detected a change in curvature of the temperature-dependent unit cell volume of the average tetragonal crystallographic structure at a temperature coinciding with the onset of ferromagnetic order. We also observed the existence of a well-defined local orthorhombic structure on a short length scale of ≲5Å, resulting in a rather asymmetrical local environment of the Mn and As ions. Finally, the magnetic PDF revealed ferromagnetic alignment of Mn spins along the crystallographic c axis, with robust nearest-neighbor ferromagnetic correlations that exist even above the ferromagnetic ordering temperature. We discuss these results in the context of other experiments and theoretical studies on this system.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000382718900001
DO  - DOI:10.1103/PhysRevB.94.094102
UR  - https://juser.fz-juelich.de/record/819969
ER  -