Nuclear Magnetic Resonances of Mn55 and N14 in Ferrimagnetic Intermetallic Mn4N–Anisotropic and Transferred Hyperfine Fields in Intermetallic Compound

Publisher Website
Google Scholar
Abstract
NMR of Mn 55 and N 14 in Mn 4 N were studied in its ferrimagnetic ordered phase, by using both pulsed and steady state methods. Three resonance lines are separately observed from corner site Mn (Mn-I), face-centered site Mn (Mn-II) and N. The resonance line of Mn-II is much broader than those of Mn-I and N, and has a complex structure, which can be accounted for as a powder pattern of quadrupole split lines modified by an anisotropic hyperfine interaction. The hyperfine field at Mn-I is antiparallel to, and those at Mn-II and N, are parallel to the macroscopic magnetization. Resonance frequencies of Mn-I and N decrease with temperature as usual, whereas that of Mn-II increases initially with temperature, it then follows a steep fall off. From the temperature dependences of these resonance frequencies and sub-lattice magnetizations, derived by neutron diffraction, the phenomenological isotropic hyperfine coupling constants including the transferred hyperfine coupling are estimated. Some discussions are given of these results.

This publication has 10 references indexed in Scilit: