TY  - JOUR
AU  - Sun, X.
AU  - Feng, E.
AU  - Su, Y.
AU  - Petracic, O.
AU  - Nemkovskiy, Kirill
AU  - Brückel, Thomas
TI  - Magnetic properties and spin structure of MnO single crystal and powder
JO  - Journal of physics / Conference Series
VL  - 862
SN  - 1742-6596
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2017-04197
SP  - 012027 -
PY  - 2017
AB  - Zero field cooled (ZFC)/Field Cooled (FC) magnetization curves of a bulk MnO single crystal show a peculiar peak at low temperatures (~ 40 K) similar to the low temperature peak observed in MnO nanoparticles. In order to investigate the origin of this peak, the spin structure of a MnO single crystal has been studied and compared with a single phase powder sample using magnetometry and polarized neutron scattering. Both magnetometry and polarized neutron diffraction results confirm the antiferromagnetic (AF) phase transition at the Néel temperature TN of 118 K, in both powder and single crystal form. However, the low temperature peak in the ZFC/FC magnetization curves is not observed in single phase MnO powder. To better understand the observed behavior, ac susceptibility measurements have been employed. We conclude that the clear peak in the magnetic signal from the single crystal originates from a small amount of ferrimagnetic (FiM) Mn2O3 or Mn3O4 impurities, which is grown at the interfaces between MnO crystal twins.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000417442500027
DO  - DOI:10.1088/1742-6596/862/1/012027
UR  - https://juser.fz-juelich.de/record/834214
ER  -