Weak exchange degeneracy in the reactionsπ+p→K+Σ+andK−p→π−Σ+at 4, 7, 11.5, and 70 GeV/c

1979 ◽  
Vol 20 (3) ◽  
pp. 683-691
Author(s):  
B. F. L. Ward
Keyword(s):  
Exchange Degeneracy ◽  
Weak Exchange

Multiquark states and the breaking of exchange degeneracy

1979 ◽  
Vol 151 ◽  
pp. 226-236 ◽  
Author(s):  
Gary R. Goldstein ◽  
P. Haridas
Keyword(s):  
Exchange Degeneracy ◽  
Multiquark States

EXCHANGE DEGENERACY AND SU(3) FOR BARYONS

1969 ◽  
Vol 22 (5) ◽  
pp. 215-218 ◽  
Author(s):  
Richard H. Capps
Keyword(s):  
Exchange Degeneracy

Giant magnetisation step in Fe 2 : Molecular nanomagnets in the weak exchange limit

2011 ◽  
Vol 95 (5) ◽  
pp. 57002 ◽  
Author(s):  
F. El Hallak ◽  
P. Rosa ◽  
P. Vidal ◽  
I. Sheikin ◽  
M. Dressel ◽  
...  
Keyword(s):  
Molecular Nanomagnets ◽  
Weak Exchange

Theory of spin waves in triangular antiferromagnets

1978 ◽  
Vol 56 (11) ◽  
pp. 1482-1487 ◽  
Author(s):  
J. A. Oyedele ◽  
M. F. Collins
Keyword(s):  
Spin Wave ◽  
Basal Plane ◽  
Exchange Interactions ◽  
Wave Theory ◽  
Wave Dispersion ◽  
One Dimensional ◽  
Dipole Interactions ◽  
Weak Exchange ◽  
Exchange Constants ◽  
Strong Exchange

A simple hexagonal array of classical spins coupled by nearest-neighbour antiferromagnetic Heisenberg interactions has a ground state with a triangular antiferromagnetic configuration of spins. We have developed spin wave theory for triangular antiferromagnets with both Heisenberg and dipole–dipole interactions. The dipole–dipole interactions confine the spins to the hexagonal basal plane and they do not distort the equiangular triangular structure. Spin wave dispersion relations are plotted for some trial values of the exchange constants. The theory is applied to the triangular antiferromagnet CsMnBr3. This is a quasi-one-dimensional material with strong exchange interactions along the hexagonal axes and with weak exchange interactions within the basal plane that are of the same order as dipolar interactions.

An electron spin resonance study of certain vanadyl polyaminocarboxylate chelates formed in aqueous and frozen aqueous solutions

1974 ◽  
Vol 27 (12) ◽  
pp. 2535 ◽  
Author(s):  
TD Smith ◽  
JF Boas ◽  
JR Pilbrow
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Exchange Coupling ◽  
Electron Spin Resonance Study ◽  
Ph Titration ◽  
Weak Exchange ◽  
Spin Resonance ◽  
Dimeric Form ◽  
Firm Evidence ◽  
Spin Resonance Study

Potentiometric pH-titration and electron spin resonance studies have shown the existence of mono-meric, dimeric and dinuclear vanadyl chelates of certain polyaminocarboxylic acids. The ligands studied include ethylenediaminetetraacetic (edta), ethyleneglycolbis(β- aminoethyl ether)-N,N?-tetra-acetic (egta), diethylenetriaminepentaacetic (dtpa) and triethylenetetraaminehexaace- tic (ttha) acids. All the ligands form 1 : 1 chelates. The addition of ethylene glycol to the aqueous solution in each case provides circumstances for the study of the monomeric chelates, though it is not equally effective in all cases. The 1 : 1 vanadyl egta chelate above pH 5.5 gave rise to ΔMS = � 2 and ΔMS = � 1 transitions from which structural and magnetic parameters have been determined and interpreted in terms of the formation of a dimeric form of a hydrolytic product of the 1 : 1 chelate. Firm evidence for the formation of dinuclear chelates occurs only in the vanadyl ttha system. Here the room tem- perature e.s.r. spectrum shows the presence of weak exchange coupling between the vanadyl ions in the dinuclear chelate.

scholarly journals Weak exchange striction between the 4f and 3d ions in the multiferroic GdMn2O5

2019 ◽  
Vol 99 (9) ◽  
Author(s):  
Jieming Sheng ◽  
X. Tong ◽  
Feng Ye ◽  
J. A. Fernandez-Baca ◽  
H. Cao ◽  
...  
Keyword(s):  
Weak Exchange
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