The Institute of Physics ( IOP ) по журналам "Journal of Physics C: Solid State Physics"
Отображаемые элементы 1-20 из 12754
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(1985-09-20)Highly excited states of the 0.79 eV luminescent defect observed in photoluminescence excitation (PLE) measurements are interpreted as effective-mass (EMT) states of a pseudo-donor with Ei=38.3 meV. The interpretation ...
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(1976-10-14)The ENDOR technique has been used to investigate the electron distribution in CsCdF3 crystals containing Mn2+, Ni2+ and Co2+. The bond structure is of the form M2+-F--Cd2+, where M stands for Mn, Ni or Co, and the measured ...
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(1980-07-20)11B NMR studies of SmB6 support the intermediate valent character of the Sm ion: the Knight shift and linewidth data are constant over the temperature range 100-480K in agreement with its susceptibility behaviour. Furthermore, ...
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(1983-09-10)The 133Cs spin-lattice relaxation rate T1-1 has been determined in the paraelectric phase of CsH2PO4. The anomalously short values of T1 as well as the form of the critical temperature dependence are the result of the ...
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(1981-09-10)EPR measurements are reported for isolated nitrogen atoms substituted for carbon atoms in type-1A diamonds. The EPR lines are exceptionally narrow, (7.5+or-0.4) mu T. The relaxation times measured by continuous saturation ...
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(1984-07-30)The 13C NMR relaxation time T1 and Knight shift K have been measured in the organic conductor TTF-TCNQ with 13C-enriched TTF molecules. A clear anomaly in T1 and K shows that the gap in the conducting band of the TTF stack ...
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(1974-01-21)17O transferred hyperfine interactions, measured by use of the ENDOR technique are reported for Ni2+ impurities in single crystals of magnesium oxide. The interpretation of these measurements in terms of covalent spin ...
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(1978-07-28)Transferred hyperfine interaction (THFI) parameters As and (Ap+Ad) have been measured by ENDOR for 17O2- ligands of Yb3+ in CeO2 in which about 10% of the oxygen has been replaced by 17O. A molecular orbital model is used ...
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(1973-03-28)ENDOR measurements have been made on single crystals of magnesium oxide enriched in 17O and containing Mn2+, Fe3+ and Cr3+ impurities. The transferred hyperfine interactions and quadrupole interactions of nearest-neighbour ...
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(1987-01-30)The transferred hyperfine interaction parameters have been measured at 4.2K by ENDOR for five shells of 19F neighbours around Gd3+ in CsCdF3:Gd and CsCaF3:Gd. The parameters for the octahedrally coordinated ligands are ...
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(1988-04-20)19F NMR spectra of polycrystalline CsFeF4 in the paramagnetic region between 160 and 300 K reveal two distinct types of fluorine site. From the lineshift measurement together with the available magnetic susceptibility data, ...
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(1982-08-20)Earlier investigations making use of a density matrix formalism to study the average resistance of a disordered solid are extended in the 1D case to calculate moments of the resistance within a diagonal-disorder model. ...
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(1978-12-14)Current noise measurements on Si inversion layers in the region of the Na impurity band at 4.2K are presented. The measurements show that the observed 1/f noise is an intrinsic property of the hopping conduction and is not ...
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(1986-06-30)An analysis of 1H and 19F NMR spectra recorded over the entire Co2+ concentration region makes it possible to determine the interactions between resonant nuclei and paramagnetic ions in the system. The paramagnetic broadening ...
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(1986-07-20)The role of the heavy atoms in the ferroelectric phase transition in PbHPO4 has been investigated by 207Pb nuclear magnetic resonance. The 207Pb chemical shift tensors have been determined above and below Tc. The temperature ...
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(1986-06-30)The local static and dynamic properties of the mixed crystals Na(CN)xCl1-x are studied by 23Na NMR over a wide concentration range. Special emphasis is laid upon systems which transform into a low-temperature glass state ...
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(1983-11-30)23Na quadrupolar spin-lattice relaxation and dielectric dispersion data are reported for mixed crystals (K-Na)TaO3. Below 150K, the Na ions are shown to associate a dipole moment of 0.04 AA e-, which changes orientations ...
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(1971-05-28)The 5, 10 and 35 GHz 290 K epr angular spectra of Gd3+ in lanthanum ethylsulphate have been measured at 5 degrees intervals in x-z plane. The parameters in the phenomenological spin Hamiltonian for Gd3+ in lanthanum ...
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(1985-09-20)Zero-point oscillation anharmonicity induces the softening and then occurrence of the instability of the low-frequency mode omega - (at long-wave limit) of 2D electron crystal in quantised magnetic fields. 2D electron and ...
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(1984-10-30)A 2D NMR study in a single crystal of NiTiF6.6D2O in the temperature range 100-300K reveals a first-order structural phase transition 129+or-2K. The quadrupole coupling constant and the direction cosines of the principal ...
Отображаемые элементы 1-20 из 12754