CONTRIBUTION OF S-D INTERACTION TO INTERNAL MAGNETIC FIELD IN HEUSLER ALLOYS

Spin echoes and their external magnetic field effects have been observed on Heusler alloys, Cu2MnAl, Cu2MnIn and Cu2MnSn at 4.2°K. The sign of the internal magnetic field at nuclei of the constituent elements has been determined to be negative, and on the basis of the R-K-K-Y interaction semiquantitative agreement between calculated and observed internal magnetic fields has been obtained in Cu2MnAl, Cu2MnIn and Cu2MnSn. The spectra for Cu, Mn and Sn in Cu2MnSn, In in Cu2MnIn and Al in Cu2MnAl have been observed for the first time. © 1969, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.