Nanoscale magnetism control via surface and exchange anisotropy for optimized ferrimagnetic hysteresis

Seung Hyun Noh, Wonjun Na, Jung Tak Jang, Jae-Hyun Lee, Eun Jung Lee, Seung Ho Moon, Yongjun Lim, Jeon Soo Shin, Jinwoo Cheon

Research output: Contribution to journalArticle

198 Citations (Scopus)

Abstract

With the aim of controlling nanoscale magnetism, we demonstrate an approach encompassing concepts of surface and exchange anisotropy while reflecting size, shape, and structural hybridization of nanoparticles. We visualize that cube has higher magnetization value than sphere with highest coercivity at 60 nm. Its hybridization into core-shell (CS) structure brings about a 14-fold increase in the coercivity with an exceptional energy conversion of magnetic field into thermal energy of 10600 W/g, the largest reported to date. Such capability of the CS-cube is highly effective for drug resistant cancer cell treatment.

Original languageEnglish
Pages (from-to)3716-3721
Number of pages6
JournalNano Letters
Volume12
Issue number7
DOIs
Publication statusPublished - 2012 Jul 11

Fingerprint

control surfaces
Magnetism
Coercive force
coercivity
Hysteresis
Anisotropy
hysteresis
anisotropy
energy conversion
Thermal energy
Energy conversion
thermal energy
Magnetization
drugs
cancer
Cells
Magnetic fields
Nanoparticles
nanoparticles
magnetization

All Science Journal Classification (ASJC) codes

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

Cite this

Noh, Seung Hyun ; Na, Wonjun ; Jang, Jung Tak ; Lee, Jae-Hyun ; Lee, Eun Jung ; Moon, Seung Ho ; Lim, Yongjun ; Shin, Jeon Soo ; Cheon, Jinwoo. / Nanoscale magnetism control via surface and exchange anisotropy for optimized ferrimagnetic hysteresis. In: Nano Letters. 2012 ; Vol. 12, No. 7. pp. 3716-3721.
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Nanoscale magnetism control via surface and exchange anisotropy for optimized ferrimagnetic hysteresis. / Noh, Seung Hyun; Na, Wonjun; Jang, Jung Tak; Lee, Jae-Hyun; Lee, Eun Jung; Moon, Seung Ho; Lim, Yongjun; Shin, Jeon Soo; Cheon, Jinwoo.

In: Nano Letters, Vol. 12, No. 7, 11.07.2012, p. 3716-3721.

Research output: Contribution to journalArticle

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