Abstract
To obtain a large strain for Ni-Fe-Ga ferromagnetic shape memory alloys, the Curie temperature was increased by adding Co, and the magnetic-field-induced strain (MFIS) has been investigated under static stresses. The magnetocrystalline anisotropy constant K is increased by the addition of Co, and Ni49 Fe18 Ga27 Co6 alloy gives a relatively large value of 1.15× 106 erg cm3 at 300 K. From the stress-strain curves for this alloy, the twinning stress is estimated to be 8-9 MPa. Consequently, the Ni49 Fe18 Ga27 Co6 alloy exhibits a large MFIS of about 8.5% at room temperature under a static compressive stress of about 8 MPa.
Original language | English |
---|---|
Article number | 062505 |
Journal | Applied Physics Letters |
Volume | 90 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2007 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)