SEMIANNUAL REPORT, OCTOBER 1, 1965-MARCH 31, 1966.
DUKE UNIV DURHAM N C DEPT OF PHYSICS
Pagination or Media Count:
NUCLEAR RESONANCE IN SOLID H2 and D2. Measurements on derivatives of the line shape and on longitudinal relaxation time were carried out on solid H2 for several ortho concentrations as a function of temperature. A new interpretation was made of the relaxation mechanism in solid H2 the interpretation was based on electric quadrupole-quadrupole interaction. SPECIFIC HEAT OF RARE EARTH GARNETS Measurements between 0.4 and 4.0 degrees K on a superpure yttrium, iron, garnet YIG sample show that the specific heat cannot be analyzed at low enough temperatures in terms of a T 32 spin wave contribution corrected for anisotropy and dipolar coupling and the T 3 lattice contribution. NUCLEAR RESONANCE OF FE-57 IN RARE EARTH GARNETS The 57-Fe gyromagnetic ratio in YIG was measured with a precision comparable to that obtained by Endor measurements. Spinwave expressions for magnetization in YIG in an external magnetic field were tested at 63 and 77 degrees K.
- Nuclear Physics and Elementary Particle Physics