Surface vacancy mediated pinning of the magnetization in $\ensuremath{\gamma}\ensuremath{-}{\mathrm{Fe}}_{2}{\mathrm{O}}_{3}$ nanoparticles: A micromagnetic simulation study

Rapid Communication

Surface vacancy mediated pinning of the magnetization in $γ - {Fe}_{2} O_{3}$ nanoparticles: A micromagnetic simulation study

Bassel Alkadour, J. I. Mercer, J. P. Whitehead, J. van Lierop, and B. W. Southern

Phys. Rev. B 93, 140411(R) – Published 22 April 2016

Abstract

Results from finite temperature sLLG simulations of an atomistic core-shell model of $γ - {Fe}_{2} O_{3}$ nanoparticles are presented. Radial surface anisotropy gives rise to a surface magnetization with a Néel-like domain wall separating the magnetic poles. It is shown that the pinning of the domain wall by the oxygen anion sites plays an important role in low temperature relaxation processes.

Received 8 February 2016
Revised 4 April 2016

DOI:https://doi.org/10.1103/PhysRevB.93.140411

Physics Subject Headings (PhySH)

Domain walls Magnetic domains Magnetism Magnetization switching

Magnetic systems Nanoparticles Oxides Surfaces

Micromagnetic modeling

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Bassel Alkadour¹, J. I. Mercer², J. P. Whitehead¹, J. van Lierop³, and B. W. Southern³

¹Department of Physics and Physical Oceanography, Memorial University, St. John's, Newfoundland and Labrador, Canada A1B 3X7
²Department of Computer Science, Memorial University, St. John's, Newfoundland and Labrador, Canada A1B 3X5
³Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 93, Iss. 14 — 1 April 2016

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics

Surface vacancy mediated pinning of the magnetization in $γ - {Fe}_{2} O_{3}$ nanoparticles: A micromagnetic simulation study

Bassel Alkadour, J. I. Mercer, J. P. Whitehead, J. van Lierop, and B. W. Southern

Phys. Rev. B 93, 140411(R) – Published 22 April 2016

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Physical Review B

covering condensed matter and materials physics

Surface vacancy mediated pinning of the magnetization in γ−Fe2O3 nanoparticles: A micromagnetic simulation study

Bassel Alkadour, J. I. Mercer, J. P. Whitehead, J. van Lierop, and B. W. Southern

Phys. Rev. B 93, 140411(R) – Published 22 April 2016

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

Surface vacancy mediated pinning of the magnetization in $γ - {Fe}_{2} O_{3}$ nanoparticles: A micromagnetic simulation study