Electron Spin Resonance of Gd in Mg Metal

1971 ◽  
Vol 49 (3) ◽  
pp. 352-354 ◽  
Author(s):  
Shaw Ehara
Keyword(s):  
Electron Spin Resonance ◽  
Exchange Interaction ◽  
Electron Spin ◽  
Magnetic Ordering ◽  
Resistance Curve ◽  
A Value ◽  
Spin Resonance ◽  
Resistance Anomaly

ESR of Gd in dilute Mg(Gd) has been studied by Das et al. in order to understand the resistance anomaly observed in this alloy. A value for g = 2.03 ± 0.005 has been obtained for ESR of Gd in Mg(Gd).The positive s–f exchange interaction indicated in our ESR experiment accords with the sign of s–f exchange interaction obtained from the resistance curve according to Kondo's theory. At the lowest temperature the magnetic ordering in this alloy is suggested.

An electron spin resonance study of pure anthracene doped with alkali metals

1970 ◽  
Vol 23 (2) ◽  
pp. 261 ◽  
Author(s):  
VC Bien ◽  
LE Lyons
Keyword(s):  
Electron Spin Resonance ◽  
Alkali Metal ◽  
Exchange Interaction ◽  
Line Width ◽  
Electron Spin ◽  
Alkali Metals ◽  
Spin Lattice Relaxation ◽  
Electron Spin Resonance Study ◽  
Pure Nitrogen ◽  
Spin Resonance

When pure anthracene is melted under a pure nitrogen atmosphere in the presence of an alkali metal, the metal dissolves forming a blue-green melt which exhibits an electron spin resonance (e.s.r.) signal. The polycrystalline samples of the solid system (MAn) obtained by cooling the melt also exhibit e.s.r, signals but with a line-width greater than that seen in the melt. The Lorentzian line-shapes in the solid and the melt indicate that the electrons producing the signals are either delocalized, or clustered and undergoing exchange interaction. The following features are discussed: the lack of hyperfine structure in the melt except for a special case; the Curie dependence of the susceptibility; the dependence of the g-values on the alkali metal; the shifts of the g-values on melting the samples; the behaviour of the line-width with respect to deuteration of anthraoene and with respect to the different alkali metals; and the dependence of the spin-lattice relaxation time on the alkali metal and on whether the sample was solid or molten. The features indicate that the electrons behave as simple doublets, are clustered with the alkali-metal complex in the solid and undergo exchange interaction, produce motional narrowing of lines in the melt, and produce a line-width mainly dependent on the alkali metal ions in the solid and to a lesser extent in the melt.

Exchange interaction and rashba spin splitting effects in electron spin resonance in narrow-gap quantum wells

2013 ◽  
Author(s):  
S. S. Krishtopenko ◽  
A. V. Malyzhenkov ◽  
K. P. Kalinin ◽  
A. V. Ikonnikov ◽  
K. V. Maremyanin ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Quantum Wells ◽  
Exchange Interaction ◽  
Electron Spin ◽  
Spin Splitting ◽  
Narrow Gap ◽  
Rashba Spin ◽  
Spin Resonance ◽  
Rashba Spin Splitting

Reactions of pyrazine radical anions in solution. II. Oxidation reduction equilibrium between radical anions of pyrazine and anthracene

1972 ◽  
Vol 25 (12) ◽  
pp. 2597 ◽  
Author(s):  
RS Hay ◽  
PJ Pomery
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Electron Affinity ◽  
Radical Anions ◽  
Free Energies ◽  
Spectrophotometric Methods ◽  
A Value ◽  
Oxidation Reduction ◽  
Spin Resonance ◽  
Relative Electron

The relative electron affinity of pyrazine (pz) and anthracene (A) has been determined in 1,2-dimethoxyethane (dme) solution. Electron spin resonance and spectrophotometric methods were employed to study the equilibrium: (pz-,K+) + A ←→ pz + (A-,K+) The equilibrium constant for this reaction has been calculated, after consideration of other reactions of the pyrazine radical anions in the solution, and modified for the case of the equilibrium reaction of the unassociated radical anions. The resultant value has been used to calculate the relative solution electron affinity of pyrazine, which was determined to be of the order of 0.09 eV smaller than that of anthracene in dme. The free energies of solvation of the radical anions of pyrazine and anthracene have been estimated and a value of the gaseous electron affinity of pyrazine calculated.

Electron-spin-resonance analysis of magnetic ordering in Co58Mn20B10Si12 amorphous alloy

2005 ◽  
Vol 98 (8) ◽  
pp. 083902 ◽  
Author(s):  
Chong Seung Yoon ◽  
Keum Jee Chung ◽  
Ji Won Kim ◽  
Chang Kyung Kim
Keyword(s):  
Electron Spin Resonance ◽  
Amorphous Alloy ◽  
Electron Spin ◽  
Magnetic Ordering ◽  
Resonance Analysis ◽  
Spin Resonance
Sign in / Sign up

Export Citation Format

Share Document