scholarly journals Spin-Magnetic Moment of Dirac Electron, and Role of Zitterbewegung

2014 ◽  
Vol 05 (07) ◽  
pp. 534-542 ◽  
Author(s):  
Shigeru Sasabe
Keyword(s):  
Magnetic Moment ◽  
Spin Magnetic Moment ◽  
Dirac Electron

Ferromagnetism in lightly Gd doped GaN: The role of defects

2011 ◽  
Vol 1290 ◽  
Author(s):  
J. K. Mishra ◽  
S. Dhar ◽  
M. A. Khaderabad ◽  
O. Brandt
Keyword(s):  
Magnetic Properties ◽  
Molecular Beam Epitaxy ◽  
Saturation Magnetization ◽  
Magnetic Moment ◽  
Molecular Beam ◽  
Defect Density ◽  
Defect Cluster ◽  
Clear Correlation ◽  
Defect Band

ABSTRACTGd:GaN layers grown with different Gd concentrations by molecular beam epitaxy (MBE) are studied using photoconductivity and photo-thermoelectric power spectroscopy. Our study reveals that the incorporation of Gd produces a large concentration of acceptor-like defects in the GaN lattice. The defect band is found to be located ~450meV above the valence band. Moreover, the concentration of defects is found to increase with the Gd concentration. The effect of annealing on the structural and the magnetic properties of GaN implanted with Gd is also investigated. A clear correlation between the saturation magnetization and the defect density is observed in implanted samples. The colossal magnetic moment per Gd ion and the ferromagnetism observed in this material is explained in terms of the formation of giant defect cluster around each Gd ion.

scholarly journals EQUILIBRIUM CURRENTS IN A QUANTUM DOUBLE RING SYSTEM: A NON-TRIVIAL ROLE OF SYSTEM-RESERVOIR COUPLING

2004 ◽  
Vol 18 (25) ◽  
pp. 3343-3353 ◽  
Author(s):  
COLIN BENJAMIN ◽  
A. M. JAYANNAVAR
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Coupling Parameter ◽  
Ring System ◽  
Complete Agreement ◽  
Quantum Double ◽  
Double Ring ◽  
System A ◽  
S Matrix

Amperes law states that the magnetic moment of a ring is given by current times the area enclosed. Also from equilibrium statistical mechanics, it is known that magnetic moment is the derivative of free energy with respect to magnetic field. In this work, we analyze a quantum double ring system interacting with a reservoir. A simple S-Matrix model is used for system-reservoir coupling. We see complete agreement between the aforesaid two definitions when coupling between system and reservoir is weak, increasing the strength of coupling parameter, however, leads to disagreement between the two, thereby signifying the important role played by the coupling parameter in mesoscopic systems.

scholarly journals Role of anion size, magnetic moment, and disorder on the properties of the organic conductor κ-(BETS)2Ga1-xFexCl4-yBry

2010 ◽  
Vol 405 (11) ◽  
pp. S295-S298 ◽  
Author(s):  
E. Steven ◽  
H.B. Cui ◽  
A. Kismarahardja ◽  
J.S. Brooks ◽  
D. Graf ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Organic Conductor

Electronic and Magnetic Properties of Ternary Stannides RERhSn (RE = Tb, Dy and Ho)

2011 ◽  
Vol 170 ◽  
pp. 74-77 ◽  
Author(s):  
Kazimierz Łątka ◽  
Jacek Gurgul ◽  
Andrzej W. Pacyna ◽  
Rainer Pöttgen
Keyword(s):  
Magnetic Properties ◽  
Electric Field ◽  
Magnetic Moment ◽  
Magnetic Moments ◽  
Magnetic Studies ◽  
Crystalline Electric Field ◽  
Electric Field Effects ◽  
Electronic And Magnetic Properties ◽  
Field Effects

The results of magnetic studies and Mössbauer investigations made with 119Sn source are reviewed for the series of RERhSn (RE = Tb, Dy and Ho) compounds crystallizing in the same hexagonal ZrNiAl-type of structure. The role of crystalline electric field effects in the establishing of magnetic moment orientations observed in these compounds and their influence on the observed magnitudes of magnetic moments are discussed.

Sign in / Sign up

Export Citation Format

Share Document