TITLE

Atomic composition effect on the ordering of solution-phase synthesized FePt nanoparticle films

AUTHOR(S)
Yu, Andrew C. C.; Mizuno, M.; Sasaki, Y.; Kondo, H.
PUB. DATE
December 2004
SOURCE
Applied Physics Letters;12/20/2004, Vol. 85 Issue 25, p6242
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
FePt nanoparticle monolayer films were fabricated with the nanoparticles stabilized on organic-coupling-layer coated Si substrates. The as-prepared films were nonmagnetic. In order to transform the nanoparticle phase from chemically disordered face-centered-cubic to chemically ordered L10, the films were annealed at 800°C under nitrogen atmosphere for 30 min. The annealed films showed different degrees of sintering depending on the organic coupling layer materials used. At room temperature, sintered films exhibited high coercivity up to 2.4×104 Oe, while monodispersive films with insignificant sintering showed a low coercivity of 1.1×102 Oe. Such results can be explained by a large atomic composition distribution among the nanoparticles together with the size effect on ordering. Improvement of the nanoparticle atomic composition homogeneity is essential for applying the nanoparticle films for future ultrahigh-density data storage applications.
ACCESSION #
15374322

 

Related Articles

  • Structural self-organization of a monolayer of ferrosuspension particles in a high-frequency elliptically polarized field. Kashevskii, S. // Colloid Journal;Jan2006, Vol. 68 Issue 1, p59 

    Molecular dynamics is used to study structural transformations in a plane layer of spherical magnetosoft particles affected by a rotating elliptically polarized field with the polarization plane perpendicular to the layer plane. At the high-frequency limit, the expression for the pseudopotential...

  • Insights into hydrogen bond dynamics at the interface of the charged monolayer-protected Au nanoparticle from molecular dynamics simulation. Li, Yunzhi; Yang, Zhen; Hu, Na; Zhou, Rongfei; Chen, Xiangshu // Journal of Chemical Physics;May2013, Vol. 138 Issue 18, p184703 

    The structure and dynamics properties of water molecules at the interface of the charged monolayer-protected Au nanoparticle (MPAN) have been investigated in detail by using classical molecular dynamics simulation. The simulation results demonstrated clearly that a well-defined hydration layer...

  • Interactions between Langmuir�Blodgett Polymer Monolayers Studied with the Surface Force Apparatus. Tsarkova, L. A.; Protsenko, P. V.; Klein, J. // Colloid Journal;Jan/Feb2004, Vol. 66 Issue 1, p84 

    Langmuir�Blodgett monolayers from end-functionalized polyisoprene (PI�X) were studied in a surface force apparatus (SFA) as a model of a highly stretched brush melt. After deposition on a freshly cleaved mica, two identical brush monolayers (with surface area per molecule of about 170...

  • Digital magnetic heterostructures based on Si and Fe. Otrokov, M. M.; Ostanin, S. A.; Ernst, A.; Kuznetsov, V. M.; Chulkov, E. V. // Physics of the Solid State;Aug2010, Vol. 52 Issue 8, p1680 

    This paper reports on the results of ab initio calculations of the electronic and magnetic properties of Si digital heterostructures doped with a Fe monolayer of the substitutional or interstitial type. It has been revealed that, after the structural relaxation, heterostructures of both types...

  • Formation of Ultrasmall Germanium Nanoislands with a High Density on an Atomically Clean Surface of Silicon Oxide. Nikiforov, A. I.; Ul'yanov, V. V.; Pchelyakov, O. P.; Teys, S. A.; Gutakovsky, A. K. // Physics of the Solid State;Jan2005, Vol. 47 Issue 1, p67 

    The experimental results of an investigation into the initial stages of growth of a germanium film on an atomically clean oxidized silicon surface are reported. It is shown that the growth of the germanium film in this system occurs through the Volmer–Weber mechanism. Elastically strained...

  • The effect of self-assembled monolayers on polarization-dependent two-photon photoemission and on the angular distribution of the photoelectrons. Fradkin, Z.; Oron, D.; Naaman, R. // Journal of Chemical Physics;9/28/2007, Vol. 127 Issue 12, p121102 

    The effect of a self-assembled organized organic monolayer on the two-photon photoemission from semiconductor substrates was investigated. It has been found that the monolayer affects the relative yield of photoelectrons emitted by p-polarized versus s-polarized light. In addition, the monolayer...

  • Abrupt change in the structure of self-assembled monolayers upon metal evaporation. Tai, Y.; Shaporenko, A.; Eck, W.; Grunze, M.; Zharnikov, M. // Applied Physics Letters;12/20/2004, Vol. 85 Issue 25, p6257 

    We have studied the interaction of vapor-deposited nickel with thiol-terminated self-assembled monolayers (SAMs) of oligophenylthiolates on Au, which can be considered as model systems for molecular electronics. Instead of usually observed disordering of the molecular layer, a drastic decrease...

  • Nanopatterning Si(111) surfaces as a selective surface-chemistry route. Michalak, David J.; Amy, Sandrine Rivillon; Aureau, Damien; Min Dai; Estève, Alain; Chabal, Yves J. // Nature Materials;Mar2010, Vol. 9 Issue 3, p266 

    Using wet-chemical self-assembly, we demonstrate that standard surface reactions can be markedly altered. Although HF etching of Si surfaces is known to produce H-terminated surfaces, we show that up to ∼30% of a monolayer of stable Si–F bonds can be formed on atomically smooth...

  • Bulk FePt/Fe3Pt nanocomposite magnets prepared by spark plasma sintering. Rong, Chuan-Bing; Nandwana, Vikas; Poudyal, Narayan; Liu, J. Ping; Saito, Tetsuji; Wu, Yaqiao; Kramer, Matthew J. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09K515 

    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 compound from the face centered cubic to the L10 started at 500...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics