High-frequency EPR, ESE, and ENDOR spectroscopy of Co- and Mn-doped ZnO quantum dots

Pavel G. Baranov; Sergei B. Orlinskii; Celso de Mello Donega; Jan Schmidt

doi:10.1002/pssb.201200948

High-frequency EPR, ESE, and ENDOR spectroscopy of Co- and Mn-doped ZnO quantum dots

Pavel G. Baranov^*, Sergei B. Orlinskii, Celso de Mello Donega, Jan Schmidt

^*Corresponding author for this work

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

Abstract

Co- and Mn-doped ZnO quantum dots (QDs) with ZnO/Zn(OH)(2) core-shell structure were studied using high-frequency electron paramagnetic resonance (EPR), electron spin echo, and electron-nuclear double resonance (ENDOR) at low temperature. The shape of the EPR spectrum of cobalt ions was observed to change as a result of Co2+ coupling with optically created shallow donors (SDs). This, along with a shift of SDs line, is a direct demonstration of interaction between the magnetic ion and donor electron in confined system of ZnO QD. ENDOR resonance of the H-1 hydrogen nuclei detected by the EPR signal of Co2+ and Mn2+ evidence the hyperfine coupling between these ions, located in the ZnO core, and the protons outside the quantum dot core in the shell. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Original language	English
Pages (from-to)	2137-2140
Number of pages	4
Journal	Physica Status Solidi B
Volume	250
Issue number	10
DOIs	https://doi.org/10.1002/pssb.201200948
Publication status	Published - Oct 2013

Funding

This work has been supported by Ministry of Education and Science, Russia under contracts No 8017 and No 8568; the Programs of the Russian Academy of Sciences: "Spin Phenomena in Solid State Nanostructures and Spintronics", "Fundamentals of nanostructure and nanomaterial technologies", and by the Russian Foundation for Basic Research.

Keywords

Co
electron nuclear double resonance
electron paramagnetic resonance
electron spin echo
Mn
shallow donor
ZnO

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title = "High-frequency EPR, ESE, and ENDOR spectroscopy of Co- and Mn-doped ZnO quantum dots",

abstract = "Co- and Mn-doped ZnO quantum dots (QDs) with ZnO/Zn(OH)(2) core-shell structure were studied using high-frequency electron paramagnetic resonance (EPR), electron spin echo, and electron-nuclear double resonance (ENDOR) at low temperature. The shape of the EPR spectrum of cobalt ions was observed to change as a result of Co2+ coupling with optically created shallow donors (SDs). This, along with a shift of SDs line, is a direct demonstration of interaction between the magnetic ion and donor electron in confined system of ZnO QD. ENDOR resonance of the H-1 hydrogen nuclei detected by the EPR signal of Co2+ and Mn2+ evidence the hyperfine coupling between these ions, located in the ZnO core, and the protons outside the quantum dot core in the shell. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

keywords = "Co, electron nuclear double resonance, electron paramagnetic resonance, electron spin echo, Mn, shallow donor, ZnO",

author = "Baranov, {Pavel G.} and Orlinskii, {Sergei B.} and Donega, {Celso de Mello} and Jan Schmidt",

year = "2013",

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doi = "10.1002/pssb.201200948",

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T1 - High-frequency EPR, ESE, and ENDOR spectroscopy of Co- and Mn-doped ZnO quantum dots

AU - Baranov, Pavel G.

AU - Orlinskii, Sergei B.

AU - Donega, Celso de Mello

AU - Schmidt, Jan

PY - 2013/10

Y1 - 2013/10

N2 - Co- and Mn-doped ZnO quantum dots (QDs) with ZnO/Zn(OH)(2) core-shell structure were studied using high-frequency electron paramagnetic resonance (EPR), electron spin echo, and electron-nuclear double resonance (ENDOR) at low temperature. The shape of the EPR spectrum of cobalt ions was observed to change as a result of Co2+ coupling with optically created shallow donors (SDs). This, along with a shift of SDs line, is a direct demonstration of interaction between the magnetic ion and donor electron in confined system of ZnO QD. ENDOR resonance of the H-1 hydrogen nuclei detected by the EPR signal of Co2+ and Mn2+ evidence the hyperfine coupling between these ions, located in the ZnO core, and the protons outside the quantum dot core in the shell. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

AB - Co- and Mn-doped ZnO quantum dots (QDs) with ZnO/Zn(OH)(2) core-shell structure were studied using high-frequency electron paramagnetic resonance (EPR), electron spin echo, and electron-nuclear double resonance (ENDOR) at low temperature. The shape of the EPR spectrum of cobalt ions was observed to change as a result of Co2+ coupling with optically created shallow donors (SDs). This, along with a shift of SDs line, is a direct demonstration of interaction between the magnetic ion and donor electron in confined system of ZnO QD. ENDOR resonance of the H-1 hydrogen nuclei detected by the EPR signal of Co2+ and Mn2+ evidence the hyperfine coupling between these ions, located in the ZnO core, and the protons outside the quantum dot core in the shell. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

KW - Co

KW - electron nuclear double resonance

KW - electron paramagnetic resonance

KW - electron spin echo

KW - Mn

KW - shallow donor

KW - ZnO

U2 - 10.1002/pssb.201200948

DO - 10.1002/pssb.201200948

M3 - Article

SN - 0370-1972

VL - 250

SP - 2137

EP - 2140

JO - Physica Status Solidi B

JF - Physica Status Solidi B

IS - 10

ER -

High-frequency EPR, ESE, and ENDOR spectroscopy of Co- and Mn-doped ZnO quantum dots

Abstract

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Keywords

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