TY  - JOUR
AU  - Xiao, Y.
AU  - Su, Y.
AU  - Schmidt, W.
AU  - Schmalzl, K.
AU  - Kumar, C. M. N.
AU  - Price, S.
AU  - Chatterji, T.
AU  - Mittal, R.
AU  - Chang, L. J.
AU  - Nandi, S.
AU  - Kumar, C. M. N.
AU  - Dhar, S. K.
AU  - Thamizhavel, A.
AU  - Brückel, T.
TI  - Field-induced spin reorientation and giant spin-lattice coupling in EuFe2As2
JO  - Physical review / B
VL  - 81
IS  - 22
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-9914
SP  - 220406
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - We have studied a EuFe2As2 single crystal by neutron diffraction under magnetic fields up to 3.5 T and temperatures down to 2 K. A field-induced spin reorientation is observed in the presence of a magnetic field along both the a and c axes, respectively. Above critical field, the ground-state antiferromagnetic configuration of Eu2+ moments transforms into a ferromagnetic structure with moments along the applied field direction. The magnetic phase diagram for Eu magnetic sublattice in EuFe2As2 is presented. A considerable strain (similar to 0.9%) is induced by the magnetic field caused by the realignment of the twinning structure. Furthermore, the realignment of the twinning structure is found to be reversible with the rebound of magnetic field, which suggested the existence of magnetic shape-memory effect. The Eu moment ordering exhibits close relationship with the twinning structure. We argue that the Zeeman energy in combined with magnetic anisotropy energy is responsible for the observed spin-lattice coupling.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000278605800001
DO  - DOI:10.1103/PhysRevB.81.220406
UR  - https://juser.fz-juelich.de/record/9914
ER  -