Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect

Wenbo Mi; Haili Bai; Qiang Zhang; Bei Zhang; Xixiang Zhang

doi:10.1143/APEX.4.043001

Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect

Wenbo Mi, Haili Bai, Qiang Zhang, Bei Zhang, Xixiang Zhang

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Abstract

Cu0.96Fe0.04O1-δ nanocrystalline films were fabricated using reactive sputtering at different oxygen partial pressures (PO2). The electrical transport properties of the films were measured in a broad temperature range (10-300 K) under magnetic fields of up to 5T. Anomalous Hall effect (AHE) of up to 0.4μΩ cm was observed at 10 K and decreased to 0.2μΩ cm at 300 K. The characteristic AHE clearly indicated the existence of ferromagnetism in these materials. The AHE weakened as PO2 increased because the increasing PO2 reduced the fraction of Fe2+ ions, and consequently weakened the double exchange coupling between Fe2+-O2--Cu2+ in the materials. © 2011 The Japan Society of Applied Physics.

Original language	English (US)
Pages (from-to)	043001
Journal	Applied Physics Express
Volume	4
Issue number	4
DOIs	https://doi.org/10.1143/APEX.4.043001
State	Published - Mar 14 2011

ASJC Scopus subject areas

General Physics and Astronomy
General Engineering

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@article{5a0ccda27e1e4c9fb80ea63f2da6fd76,

title = "Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect",

abstract = "Cu0.96Fe0.04O1-δ nanocrystalline films were fabricated using reactive sputtering at different oxygen partial pressures (PO2). The electrical transport properties of the films were measured in a broad temperature range (10-300 K) under magnetic fields of up to 5T. Anomalous Hall effect (AHE) of up to 0.4μΩ cm was observed at 10 K and decreased to 0.2μΩ cm at 300 K. The characteristic AHE clearly indicated the existence of ferromagnetism in these materials. The AHE weakened as PO2 increased because the increasing PO2 reduced the fraction of Fe2+ ions, and consequently weakened the double exchange coupling between Fe2+-O2--Cu2+ in the materials. {\textcopyright} 2011 The Japan Society of Applied Physics.",

author = "Wenbo Mi and Haili Bai and Qiang Zhang and Bei Zhang and Xixiang Zhang",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the National Natural Science Foundation of China (Nos. 50701033 and 51002104), and the Doctoral Program of Higher Education of China (No. 20070056047), Natural Science Foundation of Tianjin (No. 08JCYBJC09400) and Young Faculty Foundation of Tianjin University (TJU-YFF-08B52 and 08A05).",

year = "2011",

month = mar,

day = "14",

doi = "10.1143/APEX.4.043001",

language = "English (US)",

volume = "4",

pages = "043001",

journal = "Applied Physics Express",

issn = "1882-0778",

publisher = "Japan Society of Applied Physics",

number = "4",

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TY - JOUR

T1 - Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect

AU - Mi, Wenbo

AU - Bai, Haili

AU - Zhang, Qiang

AU - Zhang, Bei

AU - Zhang, Xixiang

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the National Natural Science Foundation of China (Nos. 50701033 and 51002104), and the Doctoral Program of Higher Education of China (No. 20070056047), Natural Science Foundation of Tianjin (No. 08JCYBJC09400) and Young Faculty Foundation of Tianjin University (TJU-YFF-08B52 and 08A05).

PY - 2011/3/14

Y1 - 2011/3/14

N2 - Cu0.96Fe0.04O1-δ nanocrystalline films were fabricated using reactive sputtering at different oxygen partial pressures (PO2). The electrical transport properties of the films were measured in a broad temperature range (10-300 K) under magnetic fields of up to 5T. Anomalous Hall effect (AHE) of up to 0.4μΩ cm was observed at 10 K and decreased to 0.2μΩ cm at 300 K. The characteristic AHE clearly indicated the existence of ferromagnetism in these materials. The AHE weakened as PO2 increased because the increasing PO2 reduced the fraction of Fe2+ ions, and consequently weakened the double exchange coupling between Fe2+-O2--Cu2+ in the materials. © 2011 The Japan Society of Applied Physics.

AB - Cu0.96Fe0.04O1-δ nanocrystalline films were fabricated using reactive sputtering at different oxygen partial pressures (PO2). The electrical transport properties of the films were measured in a broad temperature range (10-300 K) under magnetic fields of up to 5T. Anomalous Hall effect (AHE) of up to 0.4μΩ cm was observed at 10 K and decreased to 0.2μΩ cm at 300 K. The characteristic AHE clearly indicated the existence of ferromagnetism in these materials. The AHE weakened as PO2 increased because the increasing PO2 reduced the fraction of Fe2+ ions, and consequently weakened the double exchange coupling between Fe2+-O2--Cu2+ in the materials. © 2011 The Japan Society of Applied Physics.

UR - http://hdl.handle.net/10754/561732

UR - https://iopscience.iop.org/article/10.1143/APEX.4.043001

UR - http://www.scopus.com/inward/record.url?scp=79954447183&partnerID=8YFLogxK

U2 - 10.1143/APEX.4.043001

DO - 10.1143/APEX.4.043001

M3 - Article

SN - 1882-0778

VL - 4

SP - 043001

JO - Applied Physics Express

JF - Applied Physics Express

IS - 4

ER -

Ferromagnetism in reactive sputtered Cu0.96Fe 0.04O1-δ nanocrystalline films evidenced by anomalous Hall effect

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