Ferromagnetism and crossover of positive magnetoresistance to negative magnetoresistance in Na-doped ZnO

Yiren Wang; Xi Luo; Li Ting Tseng; Zhimin Ao; Tong Li; Guozhong Xing; Nina Bao; Kiyonori Suzukiis; Jun Ding; Sean Li; Jiabao Yi

doi:10.1021/cm504261q

Ferromagnetism and crossover of positive magnetoresistance to negative magnetoresistance in Na-doped ZnO

Yiren Wang
, Xi Luo
, Li Ting Tseng
, Zhimin Ao
, Tong Li
, Guozhong Xing
, Nina Bao
, Kiyonori Suzukiis
, Jun Ding
, Sean Li
, Jiabao Yi^*

^*Corresponding author for this work

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

40 Scopus citations

Abstract

Na doped ZnO films were fabricated via a hydrothermal process. The films have shown room temperature ferromagnetism and p-type conductivity. Crossover of positive to negative magnetoresistance has been observed with the variation of Na doping concentrations. The positive MR is due to p-p exchange interaction induced Zeeman splitting to suppress the hopping path of holes. The ferromagnetism is attributed to the formation of a Zn vacancy complex. The negative magnetoresistance is due to the minimization of spin-dependent scattering by the applied magnetic field.

Original language	English
Pages (from-to)	1285-1291
Number of pages	7
Journal	Chemistry of Materials
Volume	27
Issue number	4
DOIs	https://doi.org/10.1021/cm504261q
State	Published - 24 Feb 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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title = "Ferromagnetism and crossover of positive magnetoresistance to negative magnetoresistance in Na-doped ZnO",

abstract = "Na doped ZnO films were fabricated via a hydrothermal process. The films have shown room temperature ferromagnetism and p-type conductivity. Crossover of positive to negative magnetoresistance has been observed with the variation of Na doping concentrations. The positive MR is due to p-p exchange interaction induced Zeeman splitting to suppress the hopping path of holes. The ferromagnetism is attributed to the formation of a Zn vacancy complex. The negative magnetoresistance is due to the minimization of spin-dependent scattering by the applied magnetic field.",

author = "Yiren Wang and Xi Luo and Tseng, \{Li Ting\} and Zhimin Ao and Tong Li and Guozhong Xing and Nina Bao and Kiyonori Suzukiis and Jun Ding and Sean Li and Jiabao Yi",

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year = "2015",

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doi = "10.1021/cm504261q",

language = "English",

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T1 - Ferromagnetism and crossover of positive magnetoresistance to negative magnetoresistance in Na-doped ZnO

AU - Wang, Yiren

AU - Luo, Xi

AU - Tseng, Li Ting

AU - Ao, Zhimin

AU - Li, Tong

AU - Xing, Guozhong

AU - Bao, Nina

AU - Suzukiis, Kiyonori

AU - Ding, Jun

AU - Li, Sean

AU - Yi, Jiabao

PY - 2015/2/24

Y1 - 2015/2/24

N2 - Na doped ZnO films were fabricated via a hydrothermal process. The films have shown room temperature ferromagnetism and p-type conductivity. Crossover of positive to negative magnetoresistance has been observed with the variation of Na doping concentrations. The positive MR is due to p-p exchange interaction induced Zeeman splitting to suppress the hopping path of holes. The ferromagnetism is attributed to the formation of a Zn vacancy complex. The negative magnetoresistance is due to the minimization of spin-dependent scattering by the applied magnetic field.

AB - Na doped ZnO films were fabricated via a hydrothermal process. The films have shown room temperature ferromagnetism and p-type conductivity. Crossover of positive to negative magnetoresistance has been observed with the variation of Na doping concentrations. The positive MR is due to p-p exchange interaction induced Zeeman splitting to suppress the hopping path of holes. The ferromagnetism is attributed to the formation of a Zn vacancy complex. The negative magnetoresistance is due to the minimization of spin-dependent scattering by the applied magnetic field.

UR - https://www.scopus.com/pages/publications/84923335944

U2 - 10.1021/cm504261q

DO - 10.1021/cm504261q

M3 - Article

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SN - 0897-4756

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SP - 1285

EP - 1291

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 4

ER -

Ferromagnetism and crossover of positive magnetoresistance to negative magnetoresistance in Na-doped ZnO

Abstract

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