Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings

Yumu Takeno, Yasukazu Murakami, Takeshi Sato, Toshiaki Tanigaki, Hyun Soon Park, Daisuke Shindo, R. Matthew Ferguson, Kannan M. Krishnan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study reports on the correlation between crystal orientation and magnetic flux distribution of Fe3O4 nanoparticles in the form of self-assembled rings. High-resolution transmission electron microscopy demonstrated that the nanoparticles were single-crystalline, highly monodispersed, (25nm average diameter), and showed no appreciable lattice imperfections such as twins or stacking faults. Electron holography studies of these superparamagnetic nanoparticle rings indicated significant fluctuations in the magnetic flux lines, consistent with variations in the magnetocrystalline anisotropy of the nanoparticles. The observations provide useful information for a deeper understanding of the micromagnetics of ultrasmall nanoparticles, where the magnetic dipolar interaction competes with the magnetic anisotropy.

Original languageEnglish
Article number183102
JournalApplied Physics Letters
Volume105
Issue number18
DOIs
Publication statusPublished - Nov 3 2014

Fingerprint

magnetic flux
nanoparticles
rings
crystal defects
anisotropy
holography
transmission electron microscopy
high resolution
crystals
electrons
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings. / Takeno, Yumu; Murakami, Yasukazu; Sato, Takeshi; Tanigaki, Toshiaki; Park, Hyun Soon; Shindo, Daisuke; Ferguson, R. Matthew; Krishnan, Kannan M.

In: Applied Physics Letters, Vol. 105, No. 18, 183102, 03.11.2014.

Research output: Contribution to journalArticle

Takeno, Y, Murakami, Y, Sato, T, Tanigaki, T, Park, HS, Shindo, D, Ferguson, RM & Krishnan, KM 2014, 'Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings', Applied Physics Letters, vol. 105, no. 18, 183102. https://doi.org/10.1063/1.4901008
Takeno, Yumu ; Murakami, Yasukazu ; Sato, Takeshi ; Tanigaki, Toshiaki ; Park, Hyun Soon ; Shindo, Daisuke ; Ferguson, R. Matthew ; Krishnan, Kannan M. / Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings. In: Applied Physics Letters. 2014 ; Vol. 105, No. 18.
@article{422ab121c35940209b9af66f9998a7b9,
title = "Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings",
abstract = "This study reports on the correlation between crystal orientation and magnetic flux distribution of Fe3O4 nanoparticles in the form of self-assembled rings. High-resolution transmission electron microscopy demonstrated that the nanoparticles were single-crystalline, highly monodispersed, (25nm average diameter), and showed no appreciable lattice imperfections such as twins or stacking faults. Electron holography studies of these superparamagnetic nanoparticle rings indicated significant fluctuations in the magnetic flux lines, consistent with variations in the magnetocrystalline anisotropy of the nanoparticles. The observations provide useful information for a deeper understanding of the micromagnetics of ultrasmall nanoparticles, where the magnetic dipolar interaction competes with the magnetic anisotropy.",
author = "Yumu Takeno and Yasukazu Murakami and Takeshi Sato and Toshiaki Tanigaki and Park, {Hyun Soon} and Daisuke Shindo and Ferguson, {R. Matthew} and Krishnan, {Kannan M.}",
year = "2014",
month = "11",
day = "3",
doi = "10.1063/1.4901008",
language = "English",
volume = "105",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "18",

}

TY - JOUR

T1 - Morphology and magnetic flux distribution in superparamagnetic, single-crystalline Fe3O4 nanoparticle rings

AU - Takeno, Yumu

AU - Murakami, Yasukazu

AU - Sato, Takeshi

AU - Tanigaki, Toshiaki

AU - Park, Hyun Soon

AU - Shindo, Daisuke

AU - Ferguson, R. Matthew

AU - Krishnan, Kannan M.

PY - 2014/11/3

Y1 - 2014/11/3

N2 - This study reports on the correlation between crystal orientation and magnetic flux distribution of Fe3O4 nanoparticles in the form of self-assembled rings. High-resolution transmission electron microscopy demonstrated that the nanoparticles were single-crystalline, highly monodispersed, (25nm average diameter), and showed no appreciable lattice imperfections such as twins or stacking faults. Electron holography studies of these superparamagnetic nanoparticle rings indicated significant fluctuations in the magnetic flux lines, consistent with variations in the magnetocrystalline anisotropy of the nanoparticles. The observations provide useful information for a deeper understanding of the micromagnetics of ultrasmall nanoparticles, where the magnetic dipolar interaction competes with the magnetic anisotropy.

AB - This study reports on the correlation between crystal orientation and magnetic flux distribution of Fe3O4 nanoparticles in the form of self-assembled rings. High-resolution transmission electron microscopy demonstrated that the nanoparticles were single-crystalline, highly monodispersed, (25nm average diameter), and showed no appreciable lattice imperfections such as twins or stacking faults. Electron holography studies of these superparamagnetic nanoparticle rings indicated significant fluctuations in the magnetic flux lines, consistent with variations in the magnetocrystalline anisotropy of the nanoparticles. The observations provide useful information for a deeper understanding of the micromagnetics of ultrasmall nanoparticles, where the magnetic dipolar interaction competes with the magnetic anisotropy.

UR - http://www.scopus.com/inward/record.url?scp=84908577826&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908577826&partnerID=8YFLogxK

U2 - 10.1063/1.4901008

DO - 10.1063/1.4901008

M3 - Article

AN - SCOPUS:84908577826

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 18

M1 - 183102

ER -