THE ELECTRON SPIN RESONANCE OF Fe+3 IN SINGLE CRYSTALS OF SPODUMENE

1965 ◽  
Vol 43 (12) ◽  
pp. 2262-2275 ◽  
Author(s):  
A. Manoogian ◽  
F. Holuj ◽  
J. W. Carswell
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystals ◽  
Electron Spin ◽  
Ground State ◽  
Electric Quadrupole ◽  
Spin Hamiltonian ◽  
Electric Field Gradients ◽  
Field Gradients ◽  
Spin Resonance ◽  
Quadrupole Resonance

The electron spin resonance (ESR) spectrum of Fe+3 in spodumene, LiAl(SiO3)2, has been investigated at 24 kMc/sec. One set of five "allowed" transitions between the magnetic sublevels of the 6S5/2 ground state has been detected. The following values have been assigned to the parameters occurring in the spin Hamiltonian (eq. (1)) (bnm in gauss): gx = 2.0086 ± 50, gy = 2.0100 ± 50, gx ± 2.0046 ± 25, b20 = −1 430, b22 = −282, b40 = −20, b42 = 108, b44 = −182. Consideration of electric field gradients measured by methods of electric quadrupole resonance and of the orthorhombic parameters b20 and b22 did not lead to a unique assignment of the Fe+3 impurity to one of the two available cationic sites in spodumene.

Electron spin resonance spectra of nitric oxide adsorbed on zeolites

1970 ◽  
Vol 48 (8) ◽  
pp. 1317-1322 ◽  
Author(s):  
C. L. Gardner ◽  
M. A. Weinberger
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Iterative Procedure ◽  
Axial Component ◽  
Axially Symmetric ◽  
Electric Field Gradients ◽  
Line Shapes ◽  
Field Gradients ◽  
Spin Resonance ◽  
Surface Fields

Electron spin resonance (e.s.r.) spectra of NO adsorbed on the 4 zeolites Linde 4A, 5A, 13X, and hydrogen mordenite were measured at 77°K. No e.s.r. signal was observed for NO on silica gel. By use of expressions for the line shapes of polycrystalline samples, assuming axially symmetric g-tensors, and taking into account also isotropic coupling, values of [Formula: see text] and line width were derived by an iterative procedure. From these, the crystal field splitting, Δ, of the 2pπ levels, which become non-degenerate on adsorption, were calculated. By relating Δ to the interaction of the non-axial components of the quadru-pole moment with the corresponding electric field gradients, the non-axial component of the latter is estimated for the surface fields of the zeolites.

Electron spin resonance of Mn2+ in Cd2V2O7

1968 ◽  
Vol 46 (7) ◽  
pp. 807-810 ◽  
Author(s):  
Carl V. Stager
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystals ◽  
Electron Spin ◽  
Point Charge ◽  
Reasonable Agreement ◽  
Spin Hamiltonian ◽  
Point Charge Model ◽  
Charge Model ◽  
Spin Resonance ◽  
Hamiltonian Parameters

The electron spin resonance of Mn2+ impurities has been investigated in single crystals of Cd2V2O7. The spin-Hamiltonian parameters are gx = 2.0004(8), gy = 1.9995(8), gz = 2.0001(8), b20 = −419(1)g, b22 = 125(2)g, Ax = −86.7(3)g, Ay = −87.0(10)g, and Az = −87.4(5)g. The results have been compared with similar studies on isomorphic crystals and with a calculation employing the point-charge model for the crystal field. The model gives reasonable agreement with the experimental results.

scholarly journals Electron Spin Resonance Of Vo2+ In Likso4 Single Crystals

2004 ◽  
Vol 59 (7-8) ◽  
pp. 488-490
Author(s):  
Manu Jain
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystals ◽  
Electron Spin ◽  
Esr Spectra ◽  
Spin Hamiltonian ◽  
X Band ◽  
Spin Resonance ◽  
Hamiltonian Parameters

Electron spin resonance of VO2+ doped in LiKSO4 single crystals has been studied at 295 K, using an X-band spectrometer. Three sites have been observed. VO2+ enters the lattice at Li and K substitutional sites. The ESR spectra have been analysed and spin-Hamiltonian parameters evaluated. PACS: 76.30 F

Electron spin resonance studies of VO2+ in cadmium maleate dihydrate single crystals

Pramana ◽  
1985 ◽  
Vol 25 (6) ◽  
pp. 719-722 ◽  
Author(s):  
V Chandra Mouli ◽  
G Sivarama Sastry
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystals ◽  
Electron Spin ◽  
Spin Resonance

Electron Spin Resonance of Mn2+ in Tl2Co(SeO4)2·6H2O Single Crystals

1986 ◽  
Vol 138 (1) ◽  
pp. K55-K58 ◽  
Author(s):  
V. K. Jain ◽  
V. P. Seth ◽  
R. S. Bansal ◽  
A. Yadav
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystals ◽  
Electron Spin ◽  
Spin Resonance
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