Accession Number : AD0625544

Title :   RELAXATION OF DILUTED NICKEL FLUOSILICATE AT LOW TEMPERATURES BY STEADY-STATE RESONANCE ABSORPTION TECHNIQUES.

Descriptive Note : Technical rept., Feb 65-Jan 66,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J DEPT OF PHYSICS

Personal Author(s) : Gurbaxani,Shyam H.

Report Date : 27 DEC 1965

Pagination or Media Count : 13

Abstract : Relaxation rates from spin-lattice interaction were measured by the steady-state saturation of 3-cm microwaves in electron spin resonance at liquid-helium temperature for the paramagnetic material nickel fluosilicate. The absolute values of the relaxation time were in agreement with those found earlier in pulse measurements. The temperature dependence of the relaxation rate indicated that the direct process dominates. The relaxation rate decreases sharply when the magnetic concentration of the magnetic ions is reduced. The dependence of absorption signal of the microwave input power was that appropriate to homogeneously broadened lines, despite the fact that the lines of nickel fluosilicate have been thought to be inhomogeneously broadened. This behavior is interpreted in terms of the dominant role of cross relaxation processes. (Author)

Descriptors :   (*NICKEL COMPOUNDS, RELAXATION TIME), (*FLUORINE COMPOUNDS, RELAXATION TIME), (*SILICATES, RELAXATION TIME), CRYSTAL LATTICES, NUCLEAR SPINS, PARAMAGNETIC MATERIALS, ELECTRON PARAMAGNETIC RESONANCE, ZINC COMPOUNDS, MAGNETIC FIELDS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE