Results 271 to 280 of about 131,696 (310)

Magnetism in nanoparticles: tuning properties with coatings

Journal of Physics: Condensed Matter, 2013
This paper reviews the effect of organic and inorganic coatings on magnetic nanoparticles. The ferromagnetic-like behaviour observed in nanoparticles constituted by materials which are non-magnetic in bulk is analysed for two cases: (a) Pd and Pt nanoparticles, formed by substances close to the onset of ferromagnetism, and (b) Au and ZnO nanoparticles,
Patricia, Crespo, Patricia, de la Presa, Pilar, Marín, Marta, Multigner, José María, Alonso, Guillermo, Rivero, Félix, Yndurain, José María, González-Calbet, Antonio, Hernando   +8 more
openaire   +2 more sources

Magnetic Properties of Aucore-Coshell Nanoparticles

Journal of Applied Physics, 2011
Aucore-Coshell nanoparticles were synthesized by a wet-chemical method, and their magnetic properties were characterized. By comparing the blocking temperature of Aucore-Coshell nanoparticles to pure cobalt nanoparticles of the same size, it is proposed that cobalt spins in the shell are all aligned by exchange interaction to form single domain nano ...
Tianlong Wen, Kannan M. Krishnan
openaire   +1 more source

Magnetic properties of nanoparticles

2017
This 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, Cathrine Frandsen, Mikkel F. Hansen   +2 more
openaire   +1 more source

Structural and magnetic properties of ?-Fe2O3 nanoparticles

Applied Organometallic Chemistry, 1998
The magnetic properties of alpha-Fe2O3 nanoparticles of different shapes (spherical, rhombohedral and acicular), prepared as powders by a chemical route, have been investigated. The particle size effect on the Morin transition (T-M = 263 K in the bulk system) have been studied by analyzing the temperature dependence of the zero-field-cooled (ZFC) and ...
Suber L, García Santiago A, Fiorani D, Imperatori P, Testa, A M, Angiolini M, Montone A, Dormann, J L   +9 more
openaire   +2 more sources

Magnetic Properties of Mn3O4 Nanoparticles

AIP Conference Proceedings, 2006
Mn3O4 nanoparticles encapsulated in amorphous SiO2 were produced by the wet chemical method. The obtained precipitates were dried and annealed at temperatures between 673 K and 1273 K in air. The powder X‐ray diffraction pattern revealed Mn3O4 particles with an estimated diameter of 1.2 nm in the sample annealed at 673 K.
Yuko Ichiyanagi, Takahiro Yamada, Yusuke Kanazawa, Tetsuya Uehashi   +3 more
openaire   +1 more source

Magnetic properties of FePt nanoparticles

Journal of Magnetism and Magnetic Materials, 2003
Abstract 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, Sonja Stappert, Mehmed Acet, Eberhard F Wassermann   +3 more
openaire   +1 more source

Anomalous properties of magnetic nanoparticles

Journal of Magnetism and Magnetic Materials, 1999
Abstract 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, R.H. Kodama, Salah A. Makhlouf, F.T. Parker, F.E. Spada, E.J. McNiff, S. Foner   +6 more
openaire   +1 more source

Magnetic properties of Sm0.1Ca0.9MnO3 nanoparticles

Journal of Applied Physics, 2012
Magnetic 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, I. Fita, A. Wisniewski, R. Puzniak, D. Mogilyansky, A. Kohn, B. Dolgin, P. Iwanowski, G. Gorodetsky, G. Jung   +9 more
openaire   +1 more source

Magnetic properties of MnCr2O4 nanoparticle

Journal of Magnetism and Magnetic Materials, 2010
Abstract 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
openaire   +1 more source

Magnetic properties of iron nanoparticle

Journal of Applied Physics, 2010
Magnetic properties of Fe nanoparticles with different sizes synthesized by a physical deposition technique have been investigated experimentally. We have used a high pressure sputtering technique to deposit iron nanoparticles on a silicon substrate.
J. Carvell, E. Ayieta, A. Gavrin, Ruihua Cheng, V. R. Shah, P. Sokol   +5 more
openaire   +1 more source