Temperature dependence of the magnetic anisotropy and magnetostriction of Fe100-xGax (x=8.6, 16.6, 28.5) -: art. no. 10M316

The temperature dependence of the lowest order magnetic anisotropy constant K-1 and the lowest order saturation magnetostriction constant, (3/2)lambda(100), were measured from 4 K to 300 K for Fe91.4Ga8.6,Fe83.4Ga16.6, and Fe71.5Ga28.5 and were compared to the normalized magnetization power law, m(l(l+1)/2). Fe91.4Ga8.6 maintains the magnetostriction anomaly of Fe (d lambda(100)/dT > 0) and K, is a reasonable fit to the m(l(l+1)/2) power law with K-1(0 K) congruent to 90 kJ/m(3). Fe83.4Ga16.6 does not show a magnetostriction anomaly, but fits the power law remarkably well. Fe71.5Ga28.5 possesses a small K-1(similar to 1 kJ/m(3)) at all temperatures and a large temperature dependent magnetostriction, reaching similar to 800 ppm at low temperature. (c) 2005 American Institute of Physics.