Domain Walls in Antiferromagnets and the Weak Ferromagnetism of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathv

Li, Yin‐Yuan

doi:10.1103/physrev.101.1450

Cited by 118 publications

(38 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It follows from (v), (vi) that the domain structure may be considered as thermodynamically equilibrium notwithstanding the fact that formation of the domain walls is associated with positive contribution into free energy of the whole sample. Regularity of the domain structure (properties (ii), (iii)) excludes an entropy of domain disorder as a factor which leads to a decrease of free energy of a sample and favors formation of inhomogeneous state 8 . Properties (iv)-(vi) may be explained by presence of the elastic defects (dislocations, disclinations, etc.…”

Section: I) Magnetic Domains With Different Orientations Of Antiferromentioning

confidence: 99%

Shape-induced phenomena in finite-size antiferromagnets

Gomonay

Локтев

2007

Phys. Rev. B

View full text Add to dashboard Cite

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.

show abstract

Section: I) Magnetic Domains With Different Orientations Of Antiferromentioning

confidence: 99%

Shape-induced phenomena in finite-size antiferromagnets

Gomonay

Локтев

2007

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…Fe 2-x Cr x O 3 is one such compound series, which can be formed through the alloying of -Fe 2 O 3 and Cr 2 O 3 oxides [5,6]. The interesting points are that both -Fe 2 O 3 and Cr 2 O 3 stabilized into rhombohedral crystal structure with space group R3C [4,7] and both are antiferromagnetic insulator [8]. Cr 2 O 3 oxide is a well known compound for the prediction and experimental observation of large magneto-electric (ME) effect [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…In literature, the antiferromagnetic ordering of spins in both -Fe 2 O 3 and Cr 2 O 3 has been explained in terms of super exchange interactions (Cr-O-Cr, Fe-O-Fe) [4,8]. Neutron diffraction study explained the drastic variation of T N (~310 K for Cr 2 O 3 and ~950 K for Fe 2 O 3 ) due to a different kind of magnetic structure, although -Fe 2 O 3 and Cr 2 O 3 have shown identical crystal structure.…”

Section: Introductionmentioning

confidence: 99%

“…In order to search for the new class of materials, it has been found that solid solution of mixed metal oxides might be a potential candidate, having advantage of easy alloying due to ionic radius of same order [3,4]. Fe 2-x Cr x O 3 is one such compound series, which can be formed through the alloying of -Fe 2 O 3 and Cr 2 O 3 oxides [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the exhibition of large magnet-electric effect in Cr 2 O 3 was attributed [14] to a possible change of magnetic space group symmetry. This triggered the alloying of Fe 2-x Cr x O 3 series by mixing a suitable amount of Fe 2 O 3 (T N ~ 950 K) [4,8] in Cr 2 O 3 oxide. The study of this series also remained attractive due to its promising applications in the field of opto-electronic materials.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic modulation in mechanical alloyed Cr1.4Fe0.6O3oxide

2008

View full text Add to dashboard Cite

The compound Cr 1.4 Fe 0.6 O 3 has been synthesized through mechanical alloying of Cr 2 O 3 and -Fe 2 O 3 powders and subsequent thermal annealing. The XRD spectrum, SEM picture and microanalysis of EDAX spectrum have been used to understand the structural evolution during alloy formation. The alloyed samples have been matched to rhombohedral structure with R3C space group. The observation of a modulated magnetic order confirmed the systematic diffusion of Fe atoms into the Cr sites of lattice structure. A field induced magnetic behaviour has been noted in the field dependence of magnetization data of the annealed samples. This feature is significantly different from that of the mechanical alloyed samples. The experimental results also provided the indications of considering the present material as a potential candidate for opto-electronic applications.

show abstract

Magnetic and Dielectric Properties

Lalena

Cleary

2010

Principles of Inorganic Materials Design

View full text Add to dashboard Cite

Domain Walls in Antiferromagnets and the Weak Ferromagnetism ofα-Fe2

Cited by 118 publications

References 22 publications

Shape-induced phenomena in finite-size antiferromagnets

Shape-induced phenomena in finite-size antiferromagnets

Magnetic modulation in mechanical alloyed Cr1.4Fe0.6O3oxide

Magnetic and Dielectric Properties

Contact Info

Product

Resources

About