Room-temperature ferromagnetism and hydrogen shallow donors in rare-earth Eu-doped ZnO nanorods

Dong Min Choi; Yeon Ho Lee; Kyu Won Lee; Won Koo Park; Cheol Eui Lee

doi:10.1016/j.physb.2020.412117

Room-temperature ferromagnetism and hydrogen shallow donors in rare-earth Eu-doped ZnO nanorods

Dong Min Choi, Yeon Ho Lee, Kyu Won Lee, Won Koo Park, Cheol Eui Lee

Department of Physics

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

Abstract

Prominent room-temperature ferromagnetism in rare-earth Eu-doped ZnO nanorods has been investigated by means of magnetization and electron paramagnetic resonance (EPR) measurements. The magnetism of the unhydrogenated Eu-doped ZnO nanorods is explained by a spin-1/2 species, attributed to the Zn vacancies. In the hydrogenated Eu-doped ZnO nanorods, a spin-1 species, attributed to the Zn vacancies coupled to the hydrogen shallow donors, would give rise to a slightly enhanced magnetization. The hydrogen shallow donors, identified by the electron paramagnetic resonance (EPR) measurements, can be taken to be responsible for the changes in the spin states and magnetization of the Eu-doped ZnO nanorods.

Original language	English
Article number	412117
Journal	Physica B: Condensed Matter
Volume	585
DOIs	https://doi.org/10.1016/j.physb.2020.412117
Publication status	Published - 2020 May 15

Keywords

Electron paramagnetic resonance
Hydrogen shallow donors
Rare-earth Eu-Doped ZnO
Room-temperature ferromagnetism

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Room-temperature ferromagnetism and hydrogen shallow donors in rare-earth Eu-doped ZnO nanorods",

abstract = "Prominent room-temperature ferromagnetism in rare-earth Eu-doped ZnO nanorods has been investigated by means of magnetization and electron paramagnetic resonance (EPR) measurements. The magnetism of the unhydrogenated Eu-doped ZnO nanorods is explained by a spin-1/2 species, attributed to the Zn vacancies. In the hydrogenated Eu-doped ZnO nanorods, a spin-1 species, attributed to the Zn vacancies coupled to the hydrogen shallow donors, would give rise to a slightly enhanced magnetization. The hydrogen shallow donors, identified by the electron paramagnetic resonance (EPR) measurements, can be taken to be responsible for the changes in the spin states and magnetization of the Eu-doped ZnO nanorods.",

keywords = "Electron paramagnetic resonance, Hydrogen shallow donors, Rare-earth Eu-Doped ZnO, Room-temperature ferromagnetism",

author = "Choi, {Dong Min} and Lee, {Yeon Ho} and Lee, {Kyu Won} and Park, {Won Koo} and Lee, {Cheol Eui}",

year = "2020",

month = may,

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doi = "10.1016/j.physb.2020.412117",

language = "English",

volume = "585",

journal = "Physica B: Condensed Matter",

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T1 - Room-temperature ferromagnetism and hydrogen shallow donors in rare-earth Eu-doped ZnO nanorods

AU - Choi, Dong Min

AU - Lee, Yeon Ho

AU - Lee, Kyu Won

AU - Park, Won Koo

AU - Lee, Cheol Eui

PY - 2020/5/15

Y1 - 2020/5/15

N2 - Prominent room-temperature ferromagnetism in rare-earth Eu-doped ZnO nanorods has been investigated by means of magnetization and electron paramagnetic resonance (EPR) measurements. The magnetism of the unhydrogenated Eu-doped ZnO nanorods is explained by a spin-1/2 species, attributed to the Zn vacancies. In the hydrogenated Eu-doped ZnO nanorods, a spin-1 species, attributed to the Zn vacancies coupled to the hydrogen shallow donors, would give rise to a slightly enhanced magnetization. The hydrogen shallow donors, identified by the electron paramagnetic resonance (EPR) measurements, can be taken to be responsible for the changes in the spin states and magnetization of the Eu-doped ZnO nanorods.

AB - Prominent room-temperature ferromagnetism in rare-earth Eu-doped ZnO nanorods has been investigated by means of magnetization and electron paramagnetic resonance (EPR) measurements. The magnetism of the unhydrogenated Eu-doped ZnO nanorods is explained by a spin-1/2 species, attributed to the Zn vacancies. In the hydrogenated Eu-doped ZnO nanorods, a spin-1 species, attributed to the Zn vacancies coupled to the hydrogen shallow donors, would give rise to a slightly enhanced magnetization. The hydrogen shallow donors, identified by the electron paramagnetic resonance (EPR) measurements, can be taken to be responsible for the changes in the spin states and magnetization of the Eu-doped ZnO nanorods.

KW - Electron paramagnetic resonance

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KW - Rare-earth Eu-Doped ZnO

KW - Room-temperature ferromagnetism

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