Enhanced magnetic properties in ZnCoAlO caused by exchange-coupling to Co nanoparticles

Feng, Qi; Dizayee, Wala; Li, Xiaoli; Score, David S.; Neal, James R.; Behan, Anthony J.; Mokhtari, Abbas; Alshammari, Marzook S.; Al-Qahtani, Mohammed S.; Blythe, Harry J.; Chantrell, Roy W.; Heald, Steve M.; Xu, Xiao -Hong; Fox, A. Mark; Gehring, Gillian A.

doi:10.1088/1367-2630/18/11/113040

Title: Enhanced magnetic properties in ZnCoAlO caused by exchange-coupling to Co nanoparticles

Journal Article · Wed Nov 23 00:00:00 EST 2016 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/18/11/113040· OSTI ID:1427530

Feng, Qi ^[1]; Dizayee, Wala ^[2]; Li, Xiaoli ^[3]; Score, David S. ^[2]; Neal, James R. ^[2]; Behan, Anthony J. ^[2]; Mokhtari, Abbas ^[4]; Alshammari, Marzook S. ^[5]; Al-Qahtani, Mohammed S. ^[6]; Blythe, Harry J. ^[2]; Chantrell, Roy W. ^[7]; Heald, Steve M. ^[8]; Xu, Xiao -Hong ^[9]; Fox, A. Mark ^[2]; Gehring, Gillian A. ^[2]

The Univ. of Sheffield (United Kingdom); Chinese Academy of Sciences, Beijing (People's Republic of China)
The Univ. of Sheffield (United Kingdom)
The Univ. of Sheffield (United Kingdom); Shanxi Normal Univ., Linfen (People's Republic of China)
The Univ. of Sheffield (United Kingdom); Islamic Azad Univ. Arak Branch, Arak (Iran)
The Univ. of Sheffield (United Kingdom); King Abdulaziz City for Science and Technology, Riyadh (Saudi Arabia)
The Univ. of Sheffield (United Kingdom); King Saud Univ., Riyadh (Saudi Arabia)
The Univ. of York, York (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States)
Shanxi Normal Univ., Linfen (People's Republic of China)

Here, we report the results of a sequence of magnetisation and magneto-optical studies on laser ablated thin films of ZnCoAlO and ZnCoO that contain a small amount of metallic cobalt. The results are compared to those expected when all the magnetization is due to isolated metallic clusters of cobalt and with an oxide sample that is almost free from metallic inclusions. Using a variety of direct magnetic measurements and also magnetic circular dichroism we find that there is ferromagnetism within both the oxide and the metallic inclusions, and furthermore that these magnetic components are exchange-coupled when aluminium is included. This enhances both the coercive field and the remanence. Hence the presence of a controlled quantity of metallic nanoparticles in ZnAlO can improve the magnetic response of the oxide, thus giving great advantages for applications in spintronics.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1427530

Journal Information:: New Journal of Physics, Vol. 18, Issue 11; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Relevance of the Preparation of the Target for PLD on the Magnetic Properties of Films of Iron-Doped Indium Oxide Albargi, Hasan B.; Alshammari, Marzook S.; Museery, Kadi Y. Coatings, Vol. 9, Issue 6 https://doi.org/10.3390/coatings9060381	journal	June 2019

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Title: Enhanced magnetic properties in ZnCoAlO caused by exchange-coupling to Co nanoparticles

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