Accession Number : AD0612630

Title :   SPIN-LATTICE RELAXATION IN CESIUM-CHROME ALUM.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Turoff,Robert D.

Report Date : 01 JAN 1965

Pagination or Media Count : 12

Abstract : The spin-lattice relaxation times of three lines of the electron paramagnetic resonance spectrum at 9.6 kMc/ sec of the Cr(3+) ion in cesium chrome alum have been measured as a function of temperature between 1.6 K and 4.2 K and dilution between 0 and 36 (non-magnetic to magnetic ions) by the steady-state saturation method. The three lines were those at the lowest field (line 1), the second lowest field (line 2), and the highest field (line 3). The rates of relaxation increase with dilution for lines 1 and 2, and decrease with dilution for line 3. The dilution dependence for line 3 can be qualitatively explained by cross-relaxation, but the dilution dependences for lines 1 and 2 elude explanation. The relaxation rate of each resonance line shows at least two temperature dependences at each dilution. They are interpreted as arising from a combination of cross-relaxation and direct processes between 1.6 K and 3.0 K, and indirect processes between 3.0 K and 4.2 K. (Author)

Descriptors :   (*RELAXATION TIME, ELECTRON TRANSITIONS), (*CHROMIUM, IONS), (*PARAMAGNETIC RESONANCE, CHROMIUM), CRYOGENICS, X BAND, MOLECULAR SPECTROSCOPY, SPINNING(MOTION), CRYSTAL LATTICES, TEMPERATURE, CESIUM, CHROMIUM COMPOUNDS, AMMONIUM COMPOUNDS, SULFATES

Distribution Statement : APPROVED FOR PUBLIC RELEASE