TY - JOUR
T1 - Structural and magnetic properties of hexagonal (Mn,Fe)3-δGa
AU - Boeije, M. F.J.
AU - van Eijck, L.
AU - van Dijk, N.H.
AU - Brück, E.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - We have investigated the crystallographic and magnetic properties of (Mn,Fe)3-δGa alloys. The hexagonal phase is stable between 600 and 700 °C and can be stabilized by quenching to room temperature. Mn3Ga is reported to be off-stoichiometric, but we show that using melt-spinning the stoichiometric compound is attainable. Below the antiferromagnetic transition temperature TN, the crystal undergoes a hexagonal to monoclinic transition at the distortion temperature Td. This gives rise to an in-plane rotation of the magnetic moments that is accompanied by a simultaneous increase in magnetization in a magnetic field of 1 T. Fe substitution for Mn removes the monoclinic distortion. Substitutional Fe weakens the antiferromagnetism and a paramagnetic to ferromagnetic transition is observed. The Mn sublattice couples antiparallel throughout the series. Substitution of Ga with Si preserves the monoclinic distortion.
AB - We have investigated the crystallographic and magnetic properties of (Mn,Fe)3-δGa alloys. The hexagonal phase is stable between 600 and 700 °C and can be stabilized by quenching to room temperature. Mn3Ga is reported to be off-stoichiometric, but we show that using melt-spinning the stoichiometric compound is attainable. Below the antiferromagnetic transition temperature TN, the crystal undergoes a hexagonal to monoclinic transition at the distortion temperature Td. This gives rise to an in-plane rotation of the magnetic moments that is accompanied by a simultaneous increase in magnetization in a magnetic field of 1 T. Fe substitution for Mn removes the monoclinic distortion. Substitutional Fe weakens the antiferromagnetism and a paramagnetic to ferromagnetic transition is observed. The Mn sublattice couples antiparallel throughout the series. Substitution of Ga with Si preserves the monoclinic distortion.
KW - Antiferromagnetic spintronics
KW - Magnetoelastic transition
KW - Triangular antiferromagnet
UR - http://www.scopus.com/inward/record.url?scp=85016027002&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:f1ae8c86-dfd0-4687-bf0b-3c01ee725b47
U2 - 10.1016/j.jmmm.2017.02.058
DO - 10.1016/j.jmmm.2017.02.058
M3 - Article
AN - SCOPUS:85016027002
SN - 0304-8853
VL - 433
SP - 297
EP - 302
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -