TITLE

Exchange-coupled FePt nanoparticle assembly

AUTHOR(S)
Zeng, Hao; Sun, Shouheng; Vedantam, T. S.; Liu, J. P.; Dai, Z.-R.; Wang, Z.-L.
PUB. DATE
April 2002
SOURCE
Applied Physics Letters;4/8/2002, Vol. 80 Issue 14, p2583
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have produced exchange-coupled FePt nanoparticle assemblies by chemical synthesis and subsequent thermal annealing. As the interparticle distances decrease by tuning the annealing conditions, interparticle interactions change from dipolar type to exchange type, and the magnetization reversal mechanism switches from rotation controlled to domain-nucleation controlled. With increasing annealing temperature, the coercivity first increases due to improved chemical ordering, and then drops significantly, resulting from excessive interparticle exchange coupling. For the samples exhibiting exchange coupling, both the remanence ratio and coercive squareness increase. © 2002 American Institute of Physics.
ACCESSION #
6427054

 

Related Articles

  • Synthesis of partially thermally coupled distillation flowsheets: Zeotropic mixtures. Skvortsova, M.; Timoshenko, A.; Rudakov, D. // Theoretical Foundations of Chemical Engineering;Feb2011, Vol. 45 Issue 1, p99 

    This article presents a detailed description of algorithms for generating the complete set of n-component zeotropic distillation flowsheets for sequences of simple two-section columns and for sequences including partially thermally coupled complexes. The description of the algorithms is oriented...

  • Synthesis and structural and optical properties of metastable ZrO2 nanoparticles with intergranular Cr3+/Cr4+ doping and grain surface modification. Ram, S. // Journal of Materials Science;Feb2003, Vol. 38 Issue 4, p643 

    Nanoparticles of stabilized ZrO2 in a single cubic (c) phase are obtained with an intergranular doping of 4 to 20 at.% Cr3+/Cr4+ additives by a chemical method using a high energy amorphous precursor with polymer molecules of sucrose and polyvinyl alcohol. In the polymer, the metal cations...

  • Thermal stability of polyurethane materials based on castor oil as polyol component. Ristić, Ivan; Bjelović, Zoran; Holló, Berta; Mészáros Szécsényi, Katalin; Budinski-Simendić, Jaroslava; Lazić, Nada; Kićanović, Miodrag // Journal of Thermal Analysis & Calorimetry;Feb2013, Vol. 111 Issue 2, p1083 

    Preparation of the series of polyurethane elastomers and its nanocomposites from castor oil (a vegetable triglyceride) and different isocyanates (aromatic: toluene diisocyanate, TDI and aliphatic: isophorone diisocyanate, IPDI) is described. The synthesis was carried out in bulk and without...

  • Cyano-containing phenylene vinylene-based copolymer as blue luminescent and electron transport... Chang, En-Chung; Chen, Show-An // Journal of Applied Physics;2/15/1999, Vol. 85 Issue 4, p2057 

    Presents information on a study which synthesized a soluble cyano-containing phenylene vinylene copolymer. Thermal analysis; Experimental details; Results and discussion.

  • Microwave assisted hydrothermal synthesis of mesoporous SnO nanoparticles for ethanol sensing and degradation. Tripathy, Suraj; Mishra, Amrita; Jha, Sandeep; Wahab, Rizwan; Al-Khedhairy, Abdulaziz // Journal of Materials Science: Materials in Electronics;Jun2013, Vol. 24 Issue 6, p2082 

    We report the synthesis of mesoporous SnO nanoparticles by a microwave assisted hydrothermal process and their application as a gas sensor. The synthesized materials were characterized by transmission electron microscopy, X-ray diffraction technique, X-ray photoelectron spectroscopy, and...

  • Effects of Current on Arc Fabrication of Cu Nanoparticles. Kassaee, M. Z.; Buazar, F.; Motamedi, E. // Journal of Nanomaterials;2010, Special section p1 

    Arc-fabricated copper nanoparticles (Cu Nps) size, morphology and the crystalline structure, as well as the yields of Nps appear sensitive to the applied currents (50-160 A) in distilled water. The results indicate that the sizes of Cu Nps are directly proportional to the currents employed. At...

  • Size-tuneable synthesis of nickel nanoparticles. Donegan, Keith; Godsell, Jeffrey; Otway, David; Morris, Michael; Roy, Saibal; Holmes, Justin // Journal of Nanoparticle Research;Jan2012, Vol. 14 Issue 1, p1 

    A facile method is described for synthesising nickel nanoparticles via the thermal decomposition of an organometallic precursor in the presence of excess n-trioctylphosphine as a capping ligand. For the first time, alkylamines with different chain lengths were employed as size-limiting agents in...

  • Preparation of single-phase α-Fe(III) oxide nanoparticles by thermal decomposition. Influence of the precursor on properties. Habibi, Mohammad; Kiani, Nassibeh // Journal of Thermal Analysis & Calorimetry;May2013, Vol. 112 Issue 2, p573 

    In this research, we present an experimental procedure to prepare single-phase α-Fe(III) oxide nanoparticles by thermal decomposition of five different precursors including: iron(III) citrate; Fe(CHO), iron(III) acetylacetonate; Fe(CHO), and iron(III) oxalate; Fe(CO), iron(III) acetate;...

  • Investigation of thermal behaviour of hybrid nanostructures based on FeO and PAMAM dendrimers. Popescu, Laura; Piticescu, Roxana; Stoiciu, Maria; Vasile, Eugeniu; Trusca, Roxana // Journal of Thermal Analysis & Calorimetry;Oct2012, Vol. 110 Issue 1, p357 

    Dendrimers or biofunctionalized dendrimers can be assembled onto magnetic iron oxide nanoparticles to stabilize or functionalize inorganic nanoparticles. Carboxylated poly(amidoamine) PAMAM dendrimers (generation 4.5) have been used for the synthesis of iron oxide nanoparticles, resulting...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics