Ultrathin Interface Regime of Core-Shell Magnetic Nanoparticles for Effective Magnetism Tailoring

Seung Ho Moon, Seung Hyun Noh, Jae-Hyun Lee, Tae Hyun Shin, Yongjun Lim, Jinwoo Cheon

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The magnetic exchange coupling interaction between hard and soft magnetic phases has been important for tailoring nanoscale magnetism, but spin interactions at the core-shell interface have not been well studied. Here, we systematically investigated a new interface phenomenon termed enhanced spin canting (ESC), which is operative when the shell thickness becomes ultrathin, a few atomic layers, and exhibits a large enhancement of magnetic coercivity (HC). We found that ESC arises not from the typical hard-soft exchange coupling but rather from the large magnetic surface anisotropy (KS) of the ultrathin interface. Due to this large increase in magnetism, ultrathin core-shell nanoparticles overreach the theoretical limit of magnetic energy product ((BH)max) and exhibit one of the largest values of specific loss power (SLP), which testifies to their potential capability as an effective mediator of magnetic energy conversion.

Original languageEnglish
Pages (from-to)800-804
Number of pages5
JournalNano letters
Volume17
Issue number2
DOIs
Publication statusPublished - 2017 Feb 8

Fingerprint

Exchange coupling
Magnetism
Nanoparticles
nanoparticles
Coercive force
Energy conversion
Anisotropy
power loss
energy conversion
coercivity
interactions
anisotropy
augmentation
products
energy

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Moon, Seung Ho ; Noh, Seung Hyun ; Lee, Jae-Hyun ; Shin, Tae Hyun ; Lim, Yongjun ; Cheon, Jinwoo. / Ultrathin Interface Regime of Core-Shell Magnetic Nanoparticles for Effective Magnetism Tailoring. In: Nano letters. 2017 ; Vol. 17, No. 2. pp. 800-804.
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Ultrathin Interface Regime of Core-Shell Magnetic Nanoparticles for Effective Magnetism Tailoring. / Moon, Seung Ho; Noh, Seung Hyun; Lee, Jae-Hyun; Shin, Tae Hyun; Lim, Yongjun; Cheon, Jinwoo.

In: Nano letters, Vol. 17, No. 2, 08.02.2017, p. 800-804.

Research output: Contribution to journalArticle

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