Investigation of the inverted state of nuclear magnetic levels in Co59films

Experiments that yield inversion of the Co
⁵⁹
thin film nuclear system were carried out. For nanosecond magnetization reversal by a field with a growth rate greater than
5 \cdot 10^{11}
Oe/s, 85% inversion was obtained. The investigation of the inverted state at frequencies corresponding to hexagonal (α) and f.c.c. (β) phases revealed that Co
⁵⁹
-β switches 1.3 times faster than Co
⁵⁹
-α. This is explained by the large contribution of rotational processes for Co
⁵⁹
in β phase. Longitudinal relaxation time T
1
is measured by the method of pulse inversion.