TY  - JOUR
AU  - Wilden, Johanna
AU  - Hoser, Andreas
AU  - Chikovani, Mamuka
AU  - Persson, Jörg
AU  - Voigt, Jörg
AU  - Friese, Karen
AU  - Grzechnik, Andrzej
TI  - Magnetic Transitions in the Co-Modified Mn2Sb System
JO  - Inorganics
VL  - 6
IS  - 4
SN  - 2304-6740
CY  - Basel
PB  - MDPI
M1  - FZJ-2018-06558
SP  - 113 -
PY  - 2018
AB  - Mn2Sb is ferrimagnetic below its Curie temperature (TC) and passes through a spin flip transition with decreasing temperature. The Co substitution induces an additional first-order phase transition from the ferrimagnetic (FRI) to an antiferromagnetic (AFM) state. This phase transition is connected to a sizable magnetocaloric effect (MCE). To understand the underlying mechanisms, the temperature dependence of structural and magnetic changes was analyzed. At the same time, the influence of the Co substitution was explored. Three Mn2−xCoxSb (x = 0.1, 0.15, 0.2) compounds were synthesized by cold crucible induction melting. Neutron powder diffraction was performed to determine the magnetic structures and to obtain the individual magnetic moments on both symmetrically independent Mn sites. In combination with the temperature-dependent magnetization measurements, the magnetic phase transition temperatures were identified. In the low-temperature range, additional antiferromagnetic peaks were detected, which could be indexed with a propagation vector of (0 0 ½). In Mn1.9Co0.1Sb at 50 K and in Mn1.8Co0.2Sb at 200 K, a co-existence of the FRI and the AFM state was observed. The pure AFM state only occurs in Mn1.8Co0.2Sb at 50 K.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000455070500013
DO  - DOI:10.3390/inorganics6040113
UR  - https://juser.fz-juelich.de/record/857573
ER  -