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pro vyhledávání: '"H F Symmons"'
Autor:
H F Symmons
Publikováno v:
Journal of Physics C: Solid State Physics. 3:1846-1855
Electron spin resonance techniques have been used to investigate the kinetics of the establishment of equilibrium of population distribution between nearest and next nearest neighbour Mn2+- vacancy dipoles. It is shown that the process involves W3, t
Autor:
G S Bogle, H F Symmons
Publikováno v:
Proceedings of the Physical Society. 79:775-786
The zero-field paramagnetic resonance frequencies of Gd3+ diluted in the sulphate octohydrates of yttrium, samarium and neodymium have been measured directly at 4.2°, 80° and 273 °K. The spin Hamiltonian is of the predominantly axial type and the
Autor:
R C Kemp, H F Symmons
Publikováno v:
British Journal of Applied Physics. 17:607-613
Paramagnetic resonance has been used to follow the process of aggregation of divalent manganese ions present as substitutional impurities in sodium chloride. Samples containing 7 × 10-5 mole fraction of Mn2+ have been aged at temperatures between 20
Autor:
G S Bogle, H F Symmons
Publikováno v:
Proceedings of the Physical Society. 79:468-472
The spin-Hamiltonian coefficients for Fe3+ in sapphire have been redetermined by the classical paramagnetic resonance method. The value of g is 2.0026±0.0005 and is independent of temperature. The other coefficients, in units of 10-4 cm-1, and for t
Publikováno v:
Proceedings of the Physical Society. 77:561-566
The need for direct measurements of paramagnetic resonance absorption spectra in zero magnetic field is discussed. Two spectrometers have been built which together cover the range of 8 to 18 Gc/s; with one of these a spectrum is recorded over a range
Autor:
H F Symmons
Publikováno v:
Journal of Physics C: Solid State Physics. 4:1945-1957
For pt. I see abstr. a72486 of 1970. Recent evaluations of the frequencies of the dielectric relaxation modes in NaCl doped with Mn2+ and of the rates of two of the four types of jump available to a vacancy attached to a divalent ion, together with a
Autor:
G S Bogle, H F Symmons
Publikováno v:
Proceedings of the Physical Society. 78:812-818
The splitting of the ground level of Fe3+ in (CH3NH3)Al(SO4)2. 12H2O in the absence of a magnetic field has been measured directly. At 90 °K the separation of the SZ = ± 3/2 states from the ±1/2 is equivalent to 12 227 ±5 Mc/s, and that of the ±
Autor:
J P, Walsh, H F, Symmons
Publikováno v:
The New Zealand dental journal. 68(311)
Autor:
J P, Walsh, H F, Symmons
Publikováno v:
The New Zealand dental journal. 68(311)
Autor:
G S Bogle, H F Symmons
Publikováno v:
Proceedings of the Physical Society. 73:531-532