Journal ArticleDOI
Experimental study of the Hopkinson effect in fine BaFe12O19 particles
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In this paper, an explanation based on the Stoner-wohlfarth model was proposed for thermal activation in a disordered system of BaFe 12 O 19 particles, which accounts for the Hopkinson effect.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 1991-09-01. It has received 27 citations till now. The article focuses on the topics: Single domain.read more
Citations
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Magnetic studies of nanosized nickel ferrite particles synthesized by the citrate precursor technique
Seema Prasad,Namdeo S. Gajbhiye +1 more
TL;DR: In this paper, single domain particles were found to form the linear chain like clusters because of strong magnetic dipolar interactions, and the low saturation magnetization values were attributed to the spin noncollinearity predominantly at the surface.
Journal ArticleDOI
Grain size effect on the Néel temperature and magnetic properties of nanocrystalline NiFe2O4 spinel
C. N. Chinnasamy,A. Narayanasamy,N. Ponpandian,R. Justin Joseyphus,Balachandran Jeyadevan,Kazuyuki Tohji,Kamanio Chattopadhyay +6 more
TL;DR: In this article, the average grain sizes were estimated from the X-ray line broadening of the (3 1 1) reflection, and the NiFe2O4 temperatures were determined by magneto thermogravimetric method.
Journal ArticleDOI
Mechanism of the formation of nanoscale M-type barium hexaferrite in the citrate precursor method
V.K. Sankaranarayanan,D.C. Khan +1 more
TL;DR: In this paper, it is shown that the spinel-like structure is actually a masked hexaferrite structure where the Ba2+ ion in the hexagonal layer of the unit cell is engaged due to the presence of traces of carbon.
Journal ArticleDOI
Wet chemical synthesis of multicomponent hexaferrites by gel-to-crystallite conversion and their magnetic properties
TL;DR: In this article, the hexaferrites of different compositions from the ternary phase diagram were prepared by a wet chemical process of gel-to-crystallite conversion and showed defect-free, regular, coherent growth of structural blocks.
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Magnetic properties of superparamagnetic lithium ferrite nanoparticles
Seema Verma,P. A. Joy +1 more
TL;DR: In this paper, the anomalous magnetic behavior of the lithium ferrite nanoparticles, similar to that arising from the Hopkinson effect for bulk materials, is probed in detail and explained in terms of the cumulative effect of the temperature variation of the anisotropy and particle size growth during the measurements at high temperatures.
References
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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).
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Preparation of High-Coercivity BaFe12O19
TL;DR: In this paper, a coercive force of 6000 Oe, one of the highest reported for isotropic BaFe12O19, was obtained for single-domain coprecipitated powders.
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Pretransitional effects near the convective instability in binary mixtures
H.N.W. Lekkerkerker,W.G. Laidlaw +1 more
TL;DR: In this article, the authors compared the pretransitional fluctuations of the Rayleigh-Benard or convective instability for a binary mixture and compared to the one component case, showing that the critical mode of the soft phase transition is more stable than that of the pure fluid RayleighBenard instability.
Journal ArticleDOI
Ferromagnetic properties of hexagonal iron-oxide compounds with and without a preferred orientation
TL;DR: Besprechung der Magnetisierung von hexagonalen Eisenoxydverbindungen als Funktion der Feldstarke is described in this paper, e.g.
Journal ArticleDOI
Hopkinson effect in an assembly of single domain particles- thermonagnetic curves of Nd2Fe14B-type ribbons☆
TL;DR: In this article, the Stoner-Wohlfarth model was used to explain the Hopkinson effect in a disordered system due to the rotation of magnetization of noninteracting uniaxial single domain particles.