Antiferromagnetic Resonance

antiferromagnetic resonance

[¦an·tē‚fer·ō‚mag′ned·ik ′rez·ə·nəns]
(electromagnetism)
Magnetic resonance in antiferromagnetic materials which may be observed by rotating magnetic fields in either of two opposite directions.

Antiferromagnetic Resonance

 

a kind of electron magnetic resonance. Antiferromagnetic resonance manifests itself as a sharp rise in the absorption of electromagnetic energy passing through antiferromagnetic material for certain (resonant) values of the frequency v and of the intensity of the applied magnetic field H. Antiferromagnetic materials typically have an ordered arrangement of magnetic moments for the atoms (ions). Elementary magnetic moments having the same orientation in antiferromagnetic materials form so-called sublattices (two in the simplest case). In antiferromagnetic resonance resonant vibrations are excited in the magnetization vectors of the sublattices with respect both to one another and to the direction of the applied field H. The form of the dependence of v on the effective magnetic fields in antiferromagnetic materials is very complicated and varies for different crystal structures. As a rule, a single value of an applied field corresponds to two antiferromagnetic resonance frequencies. Antiferromagnetic resonance frequencies lie in the range of 10 to 1000 gigahertz.

A study of antiferromagnetic resonance permits the values of the effective magnetic fields to be determined in an antiferromagnetic material.

A. S. BOROVIK-ROMANOV

References in periodicals archive ?
Our open-end coaxial probe measurements at the end of the paper attempt to observe the weak ferromagnetic resonance due to spin canting seen particularly in antiferromagnetic resonance investigations on crystalline [alpha]-[Fe.
This work was supported by NIST Innovative Measurement Science research grant "Detection of Corrosion in Steel-Reinforced Concrete by Antiferromagnetic Resonance.
Troup, Some antiferromagnetic resonance measurements in [alpha]?