Partial lattice participation in the spin-lattice relaxation of potassium chromium alum

Abstract

We developed a SQUID-based frequency sweeping system for a.c. susceptibility measurements. Using this instrument we found that in Potassium Chromium Alum only a part of the lattice system is involved in the spin-lattice relaxation process. This partial lattice participation amounts 60–75% of the total lattice specific heat