Journal ArticleDOI
Magnetic anisotropy and coercivity of Fe3Se4 nanostructures
Reads0
Chats0
TLDR
The hard magnetic properties of Fe(3)Se(4) nanostructures were studied both experimentally and theoretically in this article, and the measured anisotropy constant is 1.0 x 10(7) erg/cm(3), consistent with the result from first-principles calculations.Abstract:
The hard magnetic properties of Fe(3)Se(4) nanostructures were studied both experimentally and theoretically. Magnetic measurements showed that Fe(3)Se(4) nanoparticles can exhibit giant coercivity exceeding 40 kOe at low temperature (10K). This unusually large coercivity is attributed to the uniaxial magnetocrystalline anisotropy of the monoclinic structure of Fe(3)Se(4) with ordered cation vacancies. The measured anisotropy constant is 1.0 x 10(7) erg/cm(3), consistent with the result from first-principles calculations. The magnetization reversal mechanism of the nanoparticles is found to be incoherent spin rotation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3662388]read more
Citations
More filters
Journal ArticleDOI
Recent developments of rare-earth-free hard-magnetic materials
TL;DR: The 3D transition metals and their alloys with large coercivity and high Curie temperatures (working temperatures) are expected to overcome the disadvantages of rare-earth magnets as discussed by the authors.
Journal ArticleDOI
Temperature dependence of magnetic anisotropy constant in iron chalcogenide Fe(3)Se(4): Excellent agreement with theories.
TL;DR: The experimental magnetic hysteresis loop is in good agreement with the theoretical curve calculated by Stoner and Wohlfarth for a noninteracting randomly oriented uniaxial single-domain particle system, and it is shown that K is proportional to the cube of the saturation magnetization, which confirms earlier theoretical models for uniaXial magnets.
Journal ArticleDOI
Molecular Beam Epitaxy Grown Cr2Te3 Thin Films with Tunable Curie Temperatures for Spintronic Devices
Hongxi Li,Hongxi Li,Linjing Wang,Junshu Chen,Junshu Chen,Tao Yu,Liang Zhou,Yang Qiu,Hongtao He,Fei Ye,Iam Keong Sou,Gan Wang +11 more
TL;DR: Cr2Te3 is a transition-metal chalcogenide that has a perpendicular magnetic anisotropy (PMA) effect with a high Curie temperature as mentioned in this paper.
Journal ArticleDOI
Urchin‐Like Fe 3 Se 4 Hierarchitectures: A Novel Pseudocapacitive Sodium‐Ion Storage Anode with Prominent Rate and Cycling Properties
TL;DR: It is intriguing to reveal that the phase transformation from monoclinic to amorphous structure accompanied by the pseudocapacitive Na+ storage behavior accounts for the superior electrochemical performance of the urchin-like Fe3 Se4 anode.
Journal ArticleDOI
Temperature dependence of magnetization and anisotropy in uniaxial NiFe2O4 nanomagnets: Deviation from the Callen-Callen power law
TL;DR: The thermal variation of magnetic anisotropy (K) and saturation magnetization (MS) for uniaxial nickel ferrite (NiFe2O4) nanomagnets is investigated in this article.
References
More filters
Book
Introduction to Magnetic Materials
B. D. Cullity,C. D. Graham +1 more
TL;DR: In this paper, the authors present materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students.
Journal ArticleDOI
A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys
Edmund C. Stoner,E. P. Wohlfarth +1 more
TL;DR: In this paper, the effect of shape anisotropy on magnetization curves was studied for the case of ellipsoidal spheroids of revolution (e.g., ellipses of revolution).
Book
Modern Magnetic Materials: Principles and Applications
TL;DR: The classical and quantum properties of magnetism have been discussed in this article, including magnetization, magnetization in small structures, exchange couplings and nanocrystals, and magnetic recording.
Journal ArticleDOI
Local spin density functional approach to the theory of exchange interactions in ferromagnetic metals and alloys
TL;DR: In this paper, the exchange parameters of the classical Heisenberg model applied to crystals are obtained using a local spin density functional (LSDF) approach and KKR-Green functions formalism.
Journal ArticleDOI
First-principles calculations of the electronic structure of tetragonal alpha-FeTe and alpha-FeSe crystals: evidence for a bicollinear antiferromagnetic order.
TL;DR: By the first-principles electronic structure calculations, it is found that the ground state of PbO-type tetragonal alpha-FeTe is in a bicollinear antiferromagnetic order, in which the Fe local moments align ferromagnetically along a diagonal direction and antiferronagnetic along the other diagonal direction on the Fe square lattice.