Exchange interaction in magnetic materials

Exchange Interaction In Magnetic Materials. The phenomenon whereby individual atomic magnetic moments will attempt to align all other atomic magnetic moments within a material with itself is known as the exchange interaction Aharoni 2000. It differs from superexchange in the following manner. Double exchange is a related magnetic coupling interaction proposed by Clarence Zener to account for electrical transport properties. One of these electrons can visit the site occupied by the other provided that its spin has the orientation.

Ferromagnetic Exchange An Overview Sciencedirect Topics from www.sciencedirect.com

Exchange forces are very large equivalent to a field on. Indeed it is the interplay of electronic properties which are apparently unrelated to magnetism the Pauli principle in combination with the Coulomb repulsion Coulomb exchange as well. Moreover there are only 5 sizable magnetic exchange interactions and according to their signs and strengths modest magnetic frustration is expected. Unlike paramagnetic materials the atomic moments in these materials exhibit very strong interactions. If the magnetic moments align in a parallel fashion the material is ferromagnetic. Together they constitute what is known as an exchange interaction which forces two electrons to take ms and mi values that result in the minimum of electrostatic energy.

ELSEVIER Physica B 237-238 1997 336-340 Exchange interactions in magnets VP.

Exchange interactions are together with magnetic anisotropy the main features that control the magnetic properties of dinuclear and polynuclear transition-metal compounds. The kinetic exchange occurs between two electrons residing at different sites. However irrespective of this the exchange interactions should be reinvestigated beyond density functional theory. Based on the obtained magnetic exchange couplings we successfully reproduce the experimental spin-wave dispersions. The role of the relativistic magnetic interactions is still not fully understood. Moreover there are only 5 sizable magnetic exchange interactions and according to their signs and strengths modest magnetic frustration is expected.

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