Magnetic Conductive Outer Layer in Oxygen-Deficient TiO2 Single Crystals

Zhaoting Zhang; Hong Yan; Lixia Ren; Ming Li; Shuanhu Wang; Kexin Jin

doi:10.1002/pssr.201900160

Magnetic Conductive Outer Layer in Oxygen-Deficient TiO₂ Single Crystals

Zhaoting Zhang, Hong Yan, Lixia Ren, Ming Li, Shuanhu Wang, Kexin Jin

School of Physical Science and Technology

Northwestern Polytechnical University Xian

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

4 Scopus citations

Abstract

A magnetic conductive outer layer at insulating rutile TiO₂ crystals is obtained by high-temperature annealing at low oxygen pressure. The conductivity here is closely dependent on the annealing temperature and time and originates from oxygen vacancies, which has been verified by the observed mixed valence of Ti^3+/4+. The most striking observation is the occurrence of ferromagnetism demonstrated by ferromagnetic hysteresis and anomalous Hall effect. The ferromagnetic hysteresis is weakly temperature dependent, which implies a defect-induced ferromagnetism. The anomalous Hall effect provides transport evidence for the existence of a long-range ferromagnetic order. The present work presents a prototypical case of designing surface physics from the interplay of multiple factors.

Original language	English
Article number	1900160
Journal	Physica Status Solidi - Rapid Research Letters
Volume	13
Issue number	8
DOIs	https://doi.org/10.1002/pssr.201900160
State	Published - Aug 2019

Keywords

anomalous Hall effect
high-temperature annealing
magnetism
oxygen vacancy
rutile TiO

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10.1002/pssr.201900160

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title = "Magnetic Conductive Outer Layer in Oxygen-Deficient TiO2 Single Crystals",

abstract = "A magnetic conductive outer layer at insulating rutile TiO2 crystals is obtained by high-temperature annealing at low oxygen pressure. The conductivity here is closely dependent on the annealing temperature and time and originates from oxygen vacancies, which has been verified by the observed mixed valence of Ti3+/4+. The most striking observation is the occurrence of ferromagnetism demonstrated by ferromagnetic hysteresis and anomalous Hall effect. The ferromagnetic hysteresis is weakly temperature dependent, which implies a defect-induced ferromagnetism. The anomalous Hall effect provides transport evidence for the existence of a long-range ferromagnetic order. The present work presents a prototypical case of designing surface physics from the interplay of multiple factors.",

keywords = "anomalous Hall effect, high-temperature annealing, magnetism, oxygen vacancy, rutile TiO",

author = "Zhaoting Zhang and Hong Yan and Lixia Ren and Ming Li and Shuanhu Wang and Kexin Jin",

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T1 - Magnetic Conductive Outer Layer in Oxygen-Deficient TiO2 Single Crystals

AU - Zhang, Zhaoting

AU - Yan, Hong

AU - Ren, Lixia

AU - Li, Ming

AU - Wang, Shuanhu

AU - Jin, Kexin

PY - 2019/8

Y1 - 2019/8

N2 - A magnetic conductive outer layer at insulating rutile TiO2 crystals is obtained by high-temperature annealing at low oxygen pressure. The conductivity here is closely dependent on the annealing temperature and time and originates from oxygen vacancies, which has been verified by the observed mixed valence of Ti3+/4+. The most striking observation is the occurrence of ferromagnetism demonstrated by ferromagnetic hysteresis and anomalous Hall effect. The ferromagnetic hysteresis is weakly temperature dependent, which implies a defect-induced ferromagnetism. The anomalous Hall effect provides transport evidence for the existence of a long-range ferromagnetic order. The present work presents a prototypical case of designing surface physics from the interplay of multiple factors.

AB - A magnetic conductive outer layer at insulating rutile TiO2 crystals is obtained by high-temperature annealing at low oxygen pressure. The conductivity here is closely dependent on the annealing temperature and time and originates from oxygen vacancies, which has been verified by the observed mixed valence of Ti3+/4+. The most striking observation is the occurrence of ferromagnetism demonstrated by ferromagnetic hysteresis and anomalous Hall effect. The ferromagnetic hysteresis is weakly temperature dependent, which implies a defect-induced ferromagnetism. The anomalous Hall effect provides transport evidence for the existence of a long-range ferromagnetic order. The present work presents a prototypical case of designing surface physics from the interplay of multiple factors.

KW - anomalous Hall effect

KW - high-temperature annealing

KW - magnetism

KW - oxygen vacancy

KW - rutile TiO

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DO - 10.1002/pssr.201900160

M3 - 快报

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VL - 13

JO - Physica Status Solidi - Rapid Research Letters

JF - Physica Status Solidi - Rapid Research Letters

IS - 8

M1 - 1900160

ER -

Magnetic Conductive Outer Layer in Oxygen-Deficient TiO₂ Single Crystals

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