The contribution of Gd and Mn neighbours to the Gd hyperfine field in GdMn₆Ge₆

Abstract:

With the help of ^155,157Gd NMR in we derive the contribution of Gd and Mn neighbours to the hyperfine field at the rare earth site in the spiral spin phase of the intermetallic compound GdMn₆Ge₆. The substitution of Gd for Y atoms allows the determination of the separate contribution of remote Gd neighbours. The different temperature dependence of the hyperfine contributions of the Gd and Mn neighbours gives the possibility to estimate the transferred hyperfine field of Mn at the rare earth site both in magnitude and sign.