Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-01-25
Phys. Rev. B 75, N17, 174439(6) (2007)
Physics
Condensed Matter
Statistical Mechanics
7 pages, 5 figures, to appear in Phys. Rev. B, v.75, N17, 2007
Scientific paper
10.1103/PhysRevB.75.174439
It is of common knowledge that the direction of easy axis in the finite-size ferromagnetic sample is controlled by its shape. In the present paper we show that a similar phenomenon should be observed in the compensated antiferromagnets with strong magnetoelastic coupling. Destressing energy which originates from the long-range magnetoelastic forces is analogous to demagnetization energy in ferromagnetic materials and is responsible for the formation of equilibrium domain structure and anisotropy of macroscopic magnetic properties. In particular, crystal shape may be a source of additional uniaxial magnetic anisotropy which removes degeneracy of antiferromagnetic vector or artificial 4th order anisotropy in the case of a square cross-section sample. In a special case of antiferromagnetic nanopillars shape-induced anisotropy can be substantially enhanced due to lattice mismatch with the substrate. These effects can be detected by the magnetic rotational torque and antiferromagnetic resonance measurements.
Gomonay Helen V.
Loktev Vadim M.
No associations
LandOfFree
Shape-induced phenomena in the finite size antiferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Shape-induced phenomena in the finite size antiferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shape-induced phenomena in the finite size antiferromagnets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-328736