Internal field measurements in Ni and Fe by the angular correlation rnethod.

Abstract

Radioactive In III atoms were embedded into ferromagnetic Ni and Fe by thennal diffusion. The perturbed angular correlation of the gamma cascado in Cd111 was measured, giving the larmor frequency dúe to the hf-interaction between the nuclear magnetic moment and the internal ferromagnetic field H. Measurements were done at 77, 300, 493 and 680 K for Ni andat 300 and 853 K for Fe. Both demagnetized and polarized samples were used. The internal fields were at room temperature - 66.2 ± 1 .4 kG for Ni and - 349 + 8 kG for Fe.