Magnetization reversal in europium sulfide nanocrystals

Marcela L. Redígolo; Dmitry S. Koktysh; Sandra J. Rosenthal; James H. Dickerson; Zheng Gai; Lan Gao; Jian Shen

doi:10.1063/1.2396915

Magnetization reversal in europium sulfide nanocrystals

Marcela L. Redígolo, Dmitry S. Koktysh, Sandra J. Rosenthal, James H. Dickerson, Zheng Gai, Lan Gao, Jian Shen

Scanning Tunneling Microscopy Group

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The authors report the observation of the reversal in the magnetization hysteresis curve of europium sulfide nanocrystals. This phenomenon was investigated through the temperature-dependent magnetization of two classes of nanomaterials, nanocrystalline (2.0 nm≤ dNCs ≤100 nm) and quantum confined (dNCs ≤2.0 nm), where dNCs is the diameter of the nanomaterial. The effect of the size of the nanomaterial on the magnetization is attributed to the competition between the magnetic properties of strained surface atoms and unstrained core atoms. Superconducting quantum interference device probed the magnetic response. Electron microscopy and X-ray diffraction spectroscopy revealed the crystallinity and monodispersivity of the nanomaterials.

Original language	English
Article number	222501
Journal	Applied Physics Letters
Volume	89
Issue number	22
DOIs	https://doi.org/10.1063/1.2396915
State	Published - 2006

Funding

The authors thank Leonard Feldman for fruitful discussions. A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy. One of the authors (J.H.D.) recognizes support from the Ralph E. Powe Junior Faculty Enhancement Award from Oak Ridge Associated Universities. Another author (D.S.K.) recognizes support from the Vanderbilt Institute for Nanoscale Science and Engineering, Vanderbilt University.

Funders	Funder number
Vanderbilt Institute for Nanoscale Science and Engineering
U.S. Department of Energy
Basic Energy Sciences
Oak Ridge National Laboratory
Vanderbilt University

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title = "Magnetization reversal in europium sulfide nanocrystals",

abstract = "The authors report the observation of the reversal in the magnetization hysteresis curve of europium sulfide nanocrystals. This phenomenon was investigated through the temperature-dependent magnetization of two classes of nanomaterials, nanocrystalline (2.0 nm≤ dNCs ≤100 nm) and quantum confined (dNCs ≤2.0 nm), where dNCs is the diameter of the nanomaterial. The effect of the size of the nanomaterial on the magnetization is attributed to the competition between the magnetic properties of strained surface atoms and unstrained core atoms. Superconducting quantum interference device probed the magnetic response. Electron microscopy and X-ray diffraction spectroscopy revealed the crystallinity and monodispersivity of the nanomaterials.",

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T1 - Magnetization reversal in europium sulfide nanocrystals

AU - Redígolo, Marcela L.

AU - Koktysh, Dmitry S.

AU - Rosenthal, Sandra J.

AU - Dickerson, James H.

AU - Gai, Zheng

AU - Gao, Lan

AU - Shen, Jian

PY - 2006

Y1 - 2006

N2 - The authors report the observation of the reversal in the magnetization hysteresis curve of europium sulfide nanocrystals. This phenomenon was investigated through the temperature-dependent magnetization of two classes of nanomaterials, nanocrystalline (2.0 nm≤ dNCs ≤100 nm) and quantum confined (dNCs ≤2.0 nm), where dNCs is the diameter of the nanomaterial. The effect of the size of the nanomaterial on the magnetization is attributed to the competition between the magnetic properties of strained surface atoms and unstrained core atoms. Superconducting quantum interference device probed the magnetic response. Electron microscopy and X-ray diffraction spectroscopy revealed the crystallinity and monodispersivity of the nanomaterials.

AB - The authors report the observation of the reversal in the magnetization hysteresis curve of europium sulfide nanocrystals. This phenomenon was investigated through the temperature-dependent magnetization of two classes of nanomaterials, nanocrystalline (2.0 nm≤ dNCs ≤100 nm) and quantum confined (dNCs ≤2.0 nm), where dNCs is the diameter of the nanomaterial. The effect of the size of the nanomaterial on the magnetization is attributed to the competition between the magnetic properties of strained surface atoms and unstrained core atoms. Superconducting quantum interference device probed the magnetic response. Electron microscopy and X-ray diffraction spectroscopy revealed the crystallinity and monodispersivity of the nanomaterials.

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VL - 89

JO - Applied Physics Letters

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Magnetization reversal in europium sulfide nanocrystals

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