Entel, Peter; Gruner, Markus; Adeagbo, Waheed A.; Eklund, C.-J.; Zayak, Alexey T.; Akai, Hisazumi; Acet, Mehmet:
Ab initio modeling of martensitic transformations (MT) in magnetic shape memory alloys
In: Journal of Magnetism and Magnetic Materials, Jg. 310 (2007), Heft 2, S. 2761 - 2763
2007Artikel/Aufsatz in Zeitschrift
Physik (inkl. Astronomie)
thp
Titel:
Ab initio modeling of martensitic transformations (MT) in magnetic shape memory alloys
Autor*in:
Entel, PeterUDE
LSF ID
1127
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Gruner, MarkusUDE
GND
128899808
LSF ID
10281
ORCID
0000-0002-2306-1258ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Adeagbo, Waheed A.;Eklund, C.-J.;Zayak, Alexey T.;Akai, Hisazumi;Acet, MehmetUDE
LSF ID
2917
ORCID
0000-0003-3601-1601ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
2007

Abstract:

The magnetic field-induced (MFI) changes of the electronic, magnetic and phonon properties of magnetic shape memory Heusler alloys Ni–Mn–Ga and Ni–Mn–In are discussed on the basis of first-principles calculations. Without an external magnetic field, the lattice instability to shear wave propagation in [1 1 0] direction shows up in the calculation as softening of the TA2 ζ [1 1 0] (2π/a) mode at View the MathML source. The ab initio modeling of magnetic field effects shows that the phase (austenite or martensite) is favored which has larger magnetization. This is in agreement with experiments on Ni–Mn–In, for which the martensitic transformation (MT) can be shifted by 40 K to lower temperatures in an external field of 5 T.