Journal ArticleDOI
New Magnetic Anisotropy
W. H. Meiklejohn,C. P. Bean +1 more
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TLDR
In this article, a new type of magnetic anisotropy was discovered which is best described as an exchange anisotropic, which is the result of an interaction between an antiferromagnetic material and a ferromagnetic materials.Abstract:
A new type of magnetic anisotropy has been discovered which is best described as an exchange anisotropy. This anisotropy is the result of an interaction between an antiferromagnetic material and a ferromagnetic material. The material that exhibits this exchange anisotropy is a compact of fine particles of cobalt with a cobaltous oxide shell. The effect occurs only below the N\'eel temperature of the antiferromagnetic material, which is essentially room temperature for the cobaltous oxide. An exchange torque is inferred to exist between the metal and oxide which has a maximum value at 77\ifmmode^\circ\else\textdegree\fi{}K of \ensuremath{\sim}2 dyne-cm/${\mathrm{cm}}^{2}$ of interface.read more
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Journal ArticleDOI
Self-assembly of cobalt nanoparticle rings.
TL;DR: Weakly ferromagnetic cobalt nanoparticles can assemble spontaneously into nanosized "bracelets" when dispersed in organic solvents containing resorcinarenes as surfactants.
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Thermal fluctuation aftereffect model for some systems with ferromagnetic‐antiferromagnetic coupling
E. Fulcomer,S. H. Charap +1 more
TL;DR: In this article, a theoretical model is developed for coupled-film systems consisting of an underlying ferromagnetic thin film and a surface layer of antiferromagnetic material viewed as an assembly of uniaxial small particles.
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Exchange biasing of magnetoelectric composites
Enno Lage,Christine Kirchhof,Viktor Hrkac,Lorenz Kienle,Robert Jahns,Reinhard Knöchel,Eckhard Quandt,Dirk Meyners +7 more
TL;DR: Th Thin-film magnetoelectric two-two composites were fabricated by magnetron sputtering on silicon-cantilever substrates and show high sensitivity to a.c. magnetic fields with a maximum magnetOElectric coefficient of 96 V cm(-1) Oe (-1) at mechanical resonance.
Journal ArticleDOI
Synthesis and size-dependent exchange bias in inverted core-shell MnO|Mn3O4 nanoparticles.
TL;DR: Core-shell nanoparticles of MnO|Mn3O4 with average particle sizes of 5-60 nm, composed of an antiferromagnetic (AFM) core and a ferrimagnetic (FiM) shell, have been synthesized and their magnetic properties investigated.
Journal ArticleDOI
Magnetic properties of electron-doped La0.23Ca0.77MnO3 nanoparticles
V. Markovich,Grzegorz Jung,A. Wisniewski,D. Mogilyansky,Roman Puzniak,Amit Kohn,Xiaodong Wu,Kiyonori Suzuki,G. Gorodetsky +8 more
TL;DR: In this paper, the authors investigated the magnetic properties of electron-doped La0.23Ca0.77MnO3 manganite nanoparticles, with average size of 12 and 60 nm, prepared by the glycine-nitrate method, in the temperature range 5-300k and magnetic fields up to 90kOe.