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Transformation of electrical transport from variable range hopping to hard gap resistance in Zn[subscript]1−[subscript]xFe[subscript]xO[subscript]1[subscript]v magnetic semiconductor films
(American Institute of Physics, 2006-11-16)
Transformation of the electrical transport from the Efros and Shklovskii [J. Phys. C 8, L49 (1975)] variable range hopping to the “hard gap” resistance was experimentally observed in a low temperature range as the Fe ...
Bulk FePt/Fe3Pt nanocomposite magnets prepared by spark plasma sintering
(American Institute of Physics, 2007-04-27)
FePt/Fe3Pt bulk nanocomposite magnets have been prepared by the spark plasma sintering of chemically synthesized FePt and Fe3O4 nanoparticles under 100 MPa at 400–600 °C. It was found that the phase transition of the FePt ...
Bimagnetic nanoparticles with enhanced exchange coupling and energy products
(American Institute of Physics, 2009-01-06)
Bimagnetic FePt/Fe3O4 nanoparticles with core/shell or heterodimer structure have been prepared using a sequential synthetic method. The dimension of both FePt and Fe3O4 was tuned by varying the synthesis parameters. The ...
Grain boundary contribution to recoil loop openness of exchange-coupled nanocrystalline magnets
(American Institute of Physics, 2009-04-29)
It has been well known that recoil loop openness is related to soft-phase presence in exchange-coupled hard-soft nanocomposite magnets. Our study on recoil loop openness of exchange-coupled nanocrystalline magnets (both ...
Bulk FePt-based nanocomposite magnets with enhanced exchange coupling
(American Institute of Physics, 2007-07-23)
High density bulk FePt/Fe3Pt nanocomposite magnets have been prepared by high-pressure warm compaction of chemically synthesized FePt and Fe3O4 nanoparticles. It is found that the density increases with the compaction ...
Mechanism of the anomalous temperature dependence of coercivity in Sm(Co,Fe,Cu,Zr)[subscript]z high-temperature magnets
(American Institute of Physics, 2006-01-24)
Coercivity mechanism of the precipitation-hardened Sm(Co,Fe,Cu,Zr)z high-temperature magnets was found to vary with temperature by measurements of reversible magnetization. The magnetization reversal is mainly controlled ...
Do thermal fluctuations influence the recoil loops of nanocomposite magnets?
(American Institute of Physics, 2008-07-11)
An exchange-coupled FePt/Fe3Pt nanocomposite system with well defined hard/soft two-phase morphology was prepared by reducing chemically synthesized FePt/Fe3O4 bimagnetic nanoparticles. It was interesting to observe that ...
Bulk FePt-based nanocomposite magnets with enhanced exchange coupling
(AIP, 2007)
High density bulk FePt/Fe3Pt nanocomposite magnets have been prepared by high-pressure warm compaction of chemically synthesized FePt and Fe3O4 nanoparticles. It is found that the density increases with the compaction ...
Mechanism of the anomalous temperature dependence of coercivity in Sm(Co, Fe, Cu, Zr)z high temperature magnets
(AIP, 2006)
Coercivity mechanism of the precipitation-hardened Sm Co,Fe,Cu,Zr z high-temperature magnets
was found to vary with temperature by measurements of reversible magnetization. The
magnetization reversal is mainly controlled ...