Magnetostriction and magnetization of tension annealed rods of Fe82Ga18

Slow and fast growth textured polycrystalline rods of Fe82Ga18 have been annealed at 300 and 600 degrees C under 50 MPa of tensile stress for 20 min. The rods showed a built-in positive internal stress of similar to 20 MPa (300 degrees C annealing) to similar to 30 MPa (600 degrees C annealing), corresponding to an induced uniaxial anisotropy energy from -4 to -5.5 kJ/m(3). Slow growth samples showed better alignment of moments along the rod axis due to better grain alignment. After a 600 degrees 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. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3357410]