Magnetic states in a disordered binary Heisenberg magnet with competing exchange interactions

1984 ◽  
Vol 27 (10) ◽  
pp. 807-822
Author(s):  
M. V. Medvedev
Keyword(s):  
Exchange Interactions ◽  
Heisenberg Magnet ◽  
Magnetic States

Electronic States and Magnetic Coupling in Fe/Fe3O4 Junctions

2011 ◽  
Vol 1292 ◽  
Author(s):  
J. Inoue ◽  
T. Kida ◽  
S. Honda ◽  
H. Itoh ◽  
H. Yanagihara ◽  
...  
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments ◽  
Magnetic Coupling ◽  
Exchange Interactions ◽  
Coupling Energy ◽  
Local Moments ◽  
Potential Applicability ◽  
Atomic Exchange ◽  
Magnetic States ◽  
Fe Ions

ABSTRACTExchange coupling observed recently in Fe/ Fe3O4 (001) junctions shows comparable intensity to that in Co/Ru/Co trilayers, and has potential applicability to spintronics devices. To clarify the mechanism of the exchange coupling, electronic and magnetic states of Fe/ Fe3O4 junctions are calculated in the first principles method by assuming four junction structures of bcc Fe and Fe3O4 layers. It is shown that the local moments of bcc Fe atoms at the interface increase, but those of Fe ions at the interface of Fe3O4 layer decrease. The total energy of the junctions is plotted as a function of distance between Fe and Fe3O4 layers. Calculated results of the coupling energy between Fe and Fe3O4 layers, however, are larger than experimental ones by two orders of magnitude, and they correspond to inter-atomic exchange interactions at the interface. In order to explain the experimental results, we propose a mechanism of exchange coupling mediated by impurity-like states of interfacial Fe atoms which possess reversed magnetic moments in bcc Fe layer. Frustration effects in exchange coupling between Fe and Fe3O4 layers are also discussed.

Frozen magnetic states in quasi-two-dimensional Cr1/3−x NixTaS2 compounds with competing exchange interactions

1997 ◽  
Vol 39 (10) ◽  
pp. 1607-1611 ◽  
Author(s):  
G. A. Takzei ◽  
M. V. Gavrilenko ◽  
I. I. Sych ◽  
P. Esquinazi ◽  
L. M. Kulikov
Keyword(s):  
Exchange Interactions ◽  
Two Dimensional ◽  
Magnetic States

Effect of Fe substitution on structure and exchange interactions within and between the sublattices of frustrated CoCr2O4

2020 ◽  
Vol 22 (48) ◽  
pp. 28222-28229
Author(s):  
Canglong Li ◽  
Chunlei Wang ◽  
Qiankun Lei ◽  
Godfrey Okumu Barasa ◽  
Qingshan Fu ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Exchange Interactions ◽  
Geometrically Frustrated ◽  
High Interest ◽  
Points Of View ◽  
Magnetic States ◽  
Fe Substitution

Obtaining tunable magnetic states in geometrically frustrated multiferroic compound CoCr2O4 by tuning the sublattice magnetic coupling is indeed of high interest from the fundamental and applied points of view.

Phase Transitions in Magnets with Competing Exchange Interactions

2014 ◽  
Vol 215 ◽  
pp. 119-122
Author(s):  
Valery I. Belokon ◽  
Olga I. Dyachenko
Keyword(s):  
Phase Transitions ◽  
Magnetic Materials ◽  
Exchange Interactions ◽  
Field Method ◽  
External Factors ◽  
Rkky Interaction ◽  
Critical Concentrations ◽  
Interaction Field ◽  
Indirect Exchange ◽  
Magnetic States

In this investigations the systems of the nanoparticles with competing exchange interactions are considered. The critical concentrations and possible types of magnetic states of particles in the case of direct exchange and RKKY interaction in the framework of the random interaction field method are determined. It is observed that in magnetic materials with the competition of the direct and indirect exchanges changing the type of ordering is possible at the change in the intensity of the indirect exchange under the influence of external factors.

ELECTRONIC AND MAGNETIC STATES OF ULTRA-THIN Fe FILMS

1984 ◽  
Vol 45 (C5) ◽  
pp. C5-371-C5-371 ◽  
Author(s):  
A. Amiri-Hezaveh ◽  
G. Jennings ◽  
D. J. Joyner ◽  
R. F. Willis
Keyword(s):  
Magnetic States
Sign in / Sign up

Export Citation Format

Share Document