TY - JOUR
T1 - Phase diagram of Fe-doped Ni-Mn-Ga ferromagnetic shape-memory alloys
AU - Soto, Daniel
AU - Hernández, Francisco Alvarado
AU - Flores-Zúñiga, Horacio
AU - Moya, Xavier
AU - Mañosa, Lluís
AU - Planes, Antoni
AU - Aksoy, Seda
AU - Acet, Mehmet
AU - Krenke, Thorsten
PY - 2008/5/6
Y1 - 2008/5/6
N2 - We have studied the effect of Fe addition on the structural and magnetic transitions in the magnetic shape memory alloy Ni-Mn-Ga by substituting systematically each atomic species by Fe. Calorimetric and ac susceptibility measurements have been carried out in order to study the magnetic and structural transformation properties. We find that the addition of Fe modifies the structural and magnetic transformation temperatures. Magnetic transition temperatures are displaced to higher values when Fe is substituted into Ni-Mn-Ga, while martensitic and premartensitic transformation temperatures shift to lower values. Moreover, it has been found that the electron per atom concentration essentially governs the phase stability in the quaternary system. However, the observed scaling of transition temperatures with e/a differs from that reported in the related ternary system Ni-Mn-Ga.
AB - We have studied the effect of Fe addition on the structural and magnetic transitions in the magnetic shape memory alloy Ni-Mn-Ga by substituting systematically each atomic species by Fe. Calorimetric and ac susceptibility measurements have been carried out in order to study the magnetic and structural transformation properties. We find that the addition of Fe modifies the structural and magnetic transformation temperatures. Magnetic transition temperatures are displaced to higher values when Fe is substituted into Ni-Mn-Ga, while martensitic and premartensitic transformation temperatures shift to lower values. Moreover, it has been found that the electron per atom concentration essentially governs the phase stability in the quaternary system. However, the observed scaling of transition temperatures with e/a differs from that reported in the related ternary system Ni-Mn-Ga.
UR - http://www.scopus.com/inward/record.url?scp=43449135018&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.77.184103
DO - 10.1103/PhysRevB.77.184103
M3 - Article
AN - SCOPUS:43449135018
SN - 1098-0121
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 184103
ER -