Magnetostriction and magnetization of tension annealed rods of Fe82 Ga18

Abstract

Slow and fast growth textured polycrystalline rods of Fe82 Ga18 have been annealed at 300 and 600 °C under 50 MPa of tensile stress for 20 min. The rods showed a built-in positive internal stress of ∼20 MPa (300 °C annealing) to ∼30 MPa (600 °C annealing), corresponding to an induced uniaxial anisotropy energy from -4 to -5.5 kJ/ m3. Slow growth samples showed better alignment of moments along the rod axis due to better grain alignment. After a 600 °C annealing without applied stress, the sample properties showed no remnants of any prior stress annealing treatments and were better than the as-received unannealed samples. © 2010 American Institute of Physics.