Results 31 to 40 of about 324,116 (262)

Gallium Substituted "114" YBaFe4O7: From a ferrimagnetic cluster glass to a cationic disordered spin glass

open access: yes, 2012
The study of the ferrites YBaFe4-xGaxO7 shows that the substitution of Ga for Fe in YBaFe4O7 stabilizes the hexagonal symmetry for 0.40 < x < 0.70, at the expense of the cubic one. Using combined measurements of a. c. and d. c.
B. Raveau   +26 more
core   +1 more source

Growth of layered Lu$_2$Fe$_3$O$_7$ and Lu$_3$Fe$_4$O$_{10} $ single crystals exhibiting long-range charge order via the optical floating-zone method

open access: yes, 2019
We report the controlled growth of single crystals of intercalated layered Lu$ _{1+n} $Fe$ _{2+n} $O$ _{4+3n-\delta} $ ($ n $=1,2) with different oxygen stoichiometries ${\delta}$.
Angst, Manuel, Hammouda, Sabreen
core   +1 more source

Quantum electric-dipole liquid on a triangular lattice [PDF]

open access: yes, 2015
Geometric frustrations and quantum mechanical fluctuations may prohibit the formation of long-range ordering even at the lowest temperature, and therefore liquid-like ground states could be expected.
Chai, Yi-Sheng   +9 more
core   +2 more sources

Preparation and magnetic properties of high performance Ca–Sr based M-type hexagonal ferrites

open access: yesResults in Materials, 2020
In this study, the preparation and magnetic properties of Ca–Sr M-type (Ca1-x-yLaxSryFe10.9CozO19) ferrire magnets were investigated. A M-type singlephase calcined powder was synthesized with a composition of x ​= ​0.45, y ​= ​0.18 and z ​= ​0.
Ching-Chien Huang   +7 more
doaj   +1 more source

Investigation on X-ray photoelectron spectroscopy, structural and low temperature magnetic properties of Ni-Ti co-substituted M-type strontium hexaferrites prepared by ball milling technique

open access: yesResults in Physics, 2021
The effect of substituting Fe3+ ions by a combination of divalent Ni2+ and tetravalent Ti4+ in SrM hexaferrites synthesized by mechanical ball-milling technique were reported.
G.A. Alna'washi   +7 more
doaj   +1 more source

Room-Temperature Ferrimagnet with Frustrated Antiferroelectricity: Promising Candidate Toward Multiple State Memory

open access: yes, 2014
On the basis of first-principles calculations we show that the M-type hexaferrite BaFe12O19 exhibits frustrated antiferroelectricity associated with its trigonal bipyramidal Fe3+ sites.
Wang, P. S., Xiang, H. J.
core   +2 more sources

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

open access: yesAdvanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source

Gap Generation in Topological Insulator Surface States by non-Ferromagnetic Magnets

open access: yes, 2012
It is shown that, contrary to the naive expectation, single particle spectral gaps can be opened on the surface states of three dimensional topological insulators by using commensurate out- and in-plane antiferromagnetic or ferrimagnetic insulating thin ...
Cortijo, Alberto, Oroszlány, László
core   +1 more source

4D Printing of Multimaterial Flexible Magneto‐Active Polymers

open access: yesAdvanced Materials Technologies, EarlyView.
Magneto‐active polymers are 3D‐printed with tunable mechanical and magnetic properties using both superparamagnetic and hard ferromagnetic fillers. Nano‐CT imaging reveals the spatial distribution of particles within the matrix. Programmable magnetization patterns and soft, flexible architectures enable responsive actuation, offering exciting ...
Naji Tarabay   +6 more
wiley   +1 more source

The Physical Model of Formation of Hexagonal Ferrites BaFe12O19 [PDF]

open access: yesЖурнал нано- та електронної фізики, 2015
To identify the features of structural transformations occurring during the formation of the crystal lattice of hexagonal barium ferrite were studied the following issues: a) component defined that are structural element in the reaction of solid-phase ...
M.N. Shipko   +2 more
doaj  

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