Hyperfine fields at transition-element impurities in Gd

Low-temperature nuclear-orientation measurements on a number of dilute alloys of 3d and 4d transition elements in Gd host are reported. The derived hyperfine fields in kG are: GdV, -87.4 +-9.2; GdCr, +23.1 +-5.4.; GdMn, +186.4 +- 4.3; GdY, -150 +-7; GdZr, -100 +-15; GdNb, -92.9 +-0.8; GdMo, +49 +-6 or -40 (see text); and GdTc, +87.6 +-2.9. In addition, a Mossbauer-effect source experiment gives for GdFe a hyperfine field of 0 +- 16 kG. These results nearly complete the systematics for 3d and 4d impurities in Gd host, and support the model for Gd proposed by Campbell. The derived values of local moments for 3d and 4d impurities in Gd are discussed. (AIP)