Electron Paramagnetic Resonance of the V3+ Ion in CsAl(SO4)2∙12H2O

1971 ◽  
Vol 49 (11) ◽  
pp. 1539-1541 ◽  
Author(s):  
J. G. Clarke ◽  
J. A. MacKinnon
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectrum ◽  
Single Crystals ◽  
Resonance Spectrum ◽  
Paramagnetic Resonance ◽  
Microwave Spectrometer ◽  
X Band ◽  
Electron Paramagnetic

The electron paramagnetic resonance spectrum of the V3+ ion in CsAl(SO4)2∙12H2O single crystals has been studied in the {100} and {111} planes at 4.2 °K with an X-band microwave spectrometer.

Electron Paramagnetic Resonance of Ti3+ Ions in KAl(SO4)2∙12H2O

1975 ◽  
Vol 53 (8) ◽  
pp. 841-842 ◽  
Author(s):  
John A. MacKinnon ◽  
M. Shannon
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Crystals ◽  
Resonance Spectrum ◽  
Point Group ◽  
Spin Hamiltonian ◽  
Potassium Alum ◽  
Paramagnetic Resonance ◽  
Microwave Spectrometer ◽  
X Band ◽  
Electron Paramagnetic

The paramagnetic resonance spectrum of Ti3+ ions in potassium alum (KAl(SO4)2∙12H2O) single crystals has been studied in the {100} planes at 4.2 K with an X band microwave spectrometer. The spectrum is an analogue of that reported by Dionne for Ti3+ ions in rubidium alum (RbAl(SO4)2∙12H2O) and by MacKinnon and Dionne for Ti3+ ions in the thallium alum (TlAl(SO4)2∙12H2O). The spectrum was explained with a model of 12 magnetic complexes, the complexes being related to each other through the symmetry elements of the [Formula: see text] point group of the alum lattice. The three g factors for the spin Hamiltonian with S = 1/2 were found to be 1.979, 1.898, and 1.828, with an accuracy of ±0.005.

ELECTRON PARAMAGNETIC RESONANCE EXPERIMENTS WITH Ti3+ IONS IN RbAl(SO4)2 ∙ 12H2O

1964 ◽  
Vol 42 (12) ◽  
pp. 2419-2428 ◽  
Author(s):  
Gerald F. Dionne
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Resonance Spectrum ◽  
Point Group ◽  
Orthorhombic Symmetry ◽  
Spin Hamiltonian ◽  
Paramagnetic Resonance ◽  
Crystal Electric Field ◽  
Microwave Spectrometer ◽  
X Band ◽  
Electron Paramagnetic

The paramagnetic resonance spectrum of the Ti3+ ion in cubic RbAl(SO4)2 ∙ 12H2O single crystals has been studied in the {100} and {110} planes at 4.2 °K with an X-band microwave spectrometer. The spectrum, which consists of a maximum of 12 lines, has been explained by considering a model of 12 magnetic complexes which are related to each other through the symmetry elements of the Th = (2/m)3 point group of the Rb alum lattice. For the spin Hamiltonian with [Formula: see text], three g factors have been determined—1.895, 1.715, and 1.767— within an accuracy of ±0.002, indicating the existence of a crystal electric field of orthorhombic symmetry.

The Electron Paramagnetic Resonance Spectrum of γ-Irradiated Dimethyl Malonic Acid

2004 ◽  
Vol 59 (1-2) ◽  
pp. 103-104 ◽  
Author(s):  
Biray Aşik ◽  
Mehmet Birey
Keyword(s):  
Magnetic Field ◽  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectrum ◽  
Single Crystals ◽  
Malonic Acid ◽  
Hyperfine Coupling ◽  
Resonance Spectrum ◽  
Coupling Constants ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The electron paramagnetic resonance of γ -Irradiated single crystals of dimethyl malonic acid [(CH3)2C(COOH)2] has been studied for different orientations of the crystal in a magnetic field. The radicals produced by gamma irradiation have been investigated between 123 and 300 K. The spectra were found to be temperature independent, and radiation damage centres were attributed to [(CH3)2C(COOH)2]+ radicals. The g factor and hyperfine coupling constants were found to be almost isotropic with average values g = 2.0036, a(COOH)2 = 0.5 mT, a(CH3)2 = 2.1 mT, respectively, and spin density ρ = 91% of the [(CH3)2C(COOH)2]+ radical.

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