Results 151 to 160 of about 280,607 (192)
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Magnetic properties of nanoparticles
2017This article discusses the magnetic properties of nanoparticles. It first considers magnetic domains and the critical size for single-domain behavior of magnetic nanoparticles before providing an overview of magnetic anisotropy in nanoparticles.
Steen Mørup +2 more
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Anomalous properties of magnetic nanoparticles
Journal of Magnetism and Magnetic Materials, 1999Abstract Nanoparticles of ferrimagnetic NiFe2O4 and antiferromagnetic NiO exhibit a variety of anomalous magnetic properties. The lower coordination of surface spins is responsible in both cases for the observed behavior. This conclusion is supported by calculations of field-dependent spin distributions in these nanoparticles.
A.E. Berkowitz +6 more
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Magnetic properties of FePt nanoparticles
Journal of Magnetism and Magnetic Materials, 2003Abstract We have prepared FePt nanoparticles with concentrations in the vicinity of the stoichiometric Fe50Pt50 composition by means of a gas-phase-based process. The preparation technique employed allows to anneal (‘sinter’) the particles in the gas-phase prior to their deposition.
Bernd Rellinghaus +3 more
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Magnetic properties of La2NiMnO6 nanoparticles
AIP Conference Proceedings, 2012La2NiMnO6 nanopaticles with an average particle size ∼ 27nm prepared by sol-gel method. DC magnetic measurement reveals a ferromagnetic transition near 150 K with low saturation magnetic moment indicates the presence of anti-site defects. The frequency depended AC susceptibility measurements and exchange bias effects conforms the competing interactions
K. Devi Chandrsekhar +2 more
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Magnetic properties of Cr2O3 Nanoparticles
Journal of Magnetism and Magnetic Materials, 2004Abstract Magnetization measurements of ∼150 A size Cr 2 O 3 particles prepared by chemical precipitation are reported. Zero-field-cooled (ZFC) susceptibility exhibits a peak characterizing a blocking behaviour at T B ≈40 K. Above the bifurcation point of ∼160 K the reversal magnetizations vary linearly with H , whereas below it both ZFC and field-
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Magnetic properties of MnCr2O4 nanoparticle
Journal of Magnetism and Magnetic Materials, 2010Abstract The exchange interactions and the magnetic exchange energies are calculated by using the mean field theory and the probability law of Zn 1− x Mn x Cr 2 O 4 nanoparticles. The high-temperature series expansions have been applied in the spinels Zn 1− x Mn x Cr 2 O 4 systems, combined with the Pade approximants method, to ...
R. Masrour, M. Hamedoun, A. Benyoussef
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Magnetic properties of Sm0.1Ca0.9MnO3 nanoparticles
Journal of Applied Physics, 2012Magnetic properties of compacted Sm0.1Ca0.9MnO3 nanoparticles with average particle size of 25 and 60 nm have been investigated. It was found that the relative volume of the ferromagnetic phase decreases with decreasing particle size. Magnetization curves measured in field cooled and zero field cooled mode separate near the transition temperature TC ...
V. Markovich +9 more
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Magnetic properties of MnFe2O4 nanoparticles
Journal of Magnetism and Magnetic Materials, 2002Abstract In zero field cooled and field cooled measurements of nanosized MnFe2O4, two peaks were observed and the one at high temperature was attributed to the typical superparamagnetic blocking of moments of the particles. A weak maximum occurs at the temperature around 21 K, which is attributed to the freezing of moments at the surface of the ...
G Balaji +3 more
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Magnetic properties of La0.95Sr0.05CoO3 nanoparticles
AIP Conference Proceedings, 2017We report the magnetic and structural properties of La(1-x)SrxCoO3 (x = 0 & 0.05) nanoparticles. The analysis of room temperature powder x-ray diffraction confirms the crystalline nature and single phase of the prepared samples. The magnetic measurements show ferromagnetic transition at TC∼85 K, the spontaneous magnetic moment MS ∼172 emu/mol, and the ...
Ravi Prakash +3 more
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Size-dependent Magnetic Properties of PtMn Nanoparticles
INTERMAG 2006 - IEEE International Magnetics Conference, 2006In this study, PtMn nanoparticles were synthesized via a chemical method. After post-annealing at the temperature range of 500~700degC, different grain sizes were obtained. It was found the coercivity, measured at 5 K, decreased with increasing grain size. The exchange-bias was also observed at 5 K under a field-cooling process.
C.-H. Ho, C.-H. Lai
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