TY  - JOUR
A1  - Ait Haddouch, Mohammed
A1  - Abboushi, Nour
A1  - Sharma, Neetika
A1  - Eich, Andreas
A1  - Grzechnik, Andrzej
A1  - Li, Cheng
A1  - Tolkiehn, Martin
A1  - Alsamamra, Husain
A1  - Voigt, Jörg
A1  - Friese, Karen
T1  - Site dependence of the magnetocaloric effect in Mn5−xFexSi3
Y1  - 2022-09-06
VL  - 55
IS  - 5
SP  - 1164
EP  - 1172
JF  - Journal of Applied Crystallography
DO  - 10.1107/S1600576722007440
PB  - International Union of Crystallography
N2  - The nuclear and magnetic structures of Mn3Fe2Si3 are investigated in the temperature range from 20 to 300 K. The magnetic properties of Mn3Fe2Si3 were measured on a single crystal. The compound undergoes a paramagnetic to antiferromagnetic transition at TN2 ≃ 120 K and an antiferromagnetic to antiferromagnetic transition at TN1 ≃ 69 K. A similar sequence of magnetic phase transitions is found for the parent compound Mn5Si3 upon temperature variation, but the field‐driven transition observed in Mn5Si3 is not found in Mn3Fe2Si3, resulting in a strongly reduced magnetocaloric effect. Structurally, the hexagonal symmetry found for both compounds under ambient conditions is preserved in Mn3Fe2Si3 through both magnetic transitions, indicating that the crystal structure is only weakly affected by the magnetic phase transition, in contrast to Mn5Si3 where both transitions distort the nuclear structure. Both compounds feature a collinear high‐temperature magnetic phase AF2 and transfer into a non‐collinear phase AF1 at low temperature. While one of the distinct crystallographic sites remains disordered in the AF2 phase in the parent compound, the magnetic structure in the AF2 phase involves all magnetic atoms in Mn3Fe2Si3. These observations imply that the distinct sites occupied by the magnetic atoms play an important role in the magnetocaloric behaviour of the family.
N2  - The nuclear and magnetic structures of Mn3Fe2Si3 are determined and the magnetic properties are compared with those of the parent compound Mn5Si3. The results imply that the distinct magnetic sites play an important role in the magnetocaloric behaviour of the family. image
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10330
ER  -