Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films

Mukes Kapilashrami; Jun Xu; Anis Biswas; Takahiko Tamaki; Parmanand Sharma; K. V. Rao; Lyuba Belova

doi:10.1016/j.matlet.2010.03.011

Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films

Mukes Kapilashrami, Jun Xu, Anis Biswas, Takahiko Tamaki, Parmanand Sharma, K. V. Rao, Lyuba Belova

New Industry Creation Hatchery Center (NICHe)

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

12 Citations (Scopus)

Abstract

The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (∼ 870% to 40 000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (M_S) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.

Original language	English
Pages (from-to)	1291-1294
Number of pages	4
Journal	Materials Letters
Volume	64
Issue number	11
DOIs	https://doi.org/10.1016/j.matlet.2010.03.011
Publication status	Published - 2010 Jun 15

Keywords

Photoconductivity
Room-temperature ferromagnetism
Unbalanced magnetron sputtering

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2010.03.011

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title = "Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films",

abstract = "The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (∼ 870% to 40 000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (MS) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.",

keywords = "Photoconductivity, Room-temperature ferromagnetism, Unbalanced magnetron sputtering",

author = "Mukes Kapilashrami and Jun Xu and Anis Biswas and Takahiko Tamaki and Parmanand Sharma and Rao, {K. V.} and Lyuba Belova",

year = "2010",

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doi = "10.1016/j.matlet.2010.03.011",

language = "English",

volume = "64",

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journal = "Materials Letters",

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TY - JOUR

T1 - Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films

AU - Kapilashrami, Mukes

AU - Xu, Jun

AU - Biswas, Anis

AU - Tamaki, Takahiko

AU - Sharma, Parmanand

AU - Rao, K. V.

AU - Belova, Lyuba

PY - 2010/6/15

Y1 - 2010/6/15

N2 - The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (∼ 870% to 40 000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (MS) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.

AB - The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (∼ 870% to 40 000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (MS) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.

KW - Photoconductivity

KW - Room-temperature ferromagnetism

KW - Unbalanced magnetron sputtering

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U2 - 10.1016/j.matlet.2010.03.011

DO - 10.1016/j.matlet.2010.03.011

M3 - Article

AN - SCOPUS:77950516143

SN - 0167-577X

VL - 64

SP - 1291

EP - 1294

JO - Materials Letters

JF - Materials Letters

IS - 11

ER -

Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films

Abstract

Keywords

ASJC Scopus subject areas

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