Magnetism from Co and Eu implanted into ZnO

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:527

Article

Saeedi, Ahmad M. A.^1,2  Alshammari, Marzook S.³  Peng, Nianhua⁴  Adachi, Yutaka⁵  Heald, Steve M.⁶  Alanazi, Amal F.³  Gehring, Gillian A.¹ 

[1] Univ Sheffield, Dept Phys & Astron, Hicks Bldg, Sheffield S3 7RH, S Yorkshire, England

[2] Umm Al Qura Univ, Dept Phys, POB 715, Mecca 21421, Saudi Arabia

[3] KACST, King Abdulaziz City Sci & Technol, Natl Ctr Laser & Optoelect, POB 6086, Riyadh 11442, Saudi Arabia

[4] Surrey Univ, Ion Beam Ctr, Surrey GU2 7XH, England

[5] Natl Inst Mat Sci, Res Ctr Funct Mat, Electroceram Grp, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[6] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

关键词: Zinc oxide film;    Ion-implantation;    Cobalt Co2+;    Europium Eu3+;    Surface magnetism;   

DOI  :  10.1016/j.jmmm.2021.167741

来源: Elsevier

【 摘 要 】

Films of ZnO have been implanted with fluxes of Co and Eu ions so as to give a layer of Zn0.96Co0.04O or Zn0.96Eu0.04O or Zn0.92Co0.04Eu0.04O that is approximately 15 nm thick. The ZnO films were deposited by pulsed laser deposition and had an O-polar surface. The properties of the as-implanted films were compared with those obtained after annealing in air and vacuum. The amount of radiation damage was measured using Raman scattering. Measurements of the lattice constants and EXAFS demonstrated that after annealing in air the Co2+ were on Zn sites in the lattice and Eu3+ ions were surrounded by oxygen ions. The air-annealed films were ferromagnetic and the magnetic moment of the ZnCoEuO was close to the sum of that from ZnCoO and ZnEuO. This method of producing ferromagnetic ZnCoO and ZnEuO films was competitive with other methods including pulsed laser deposition.

【 授权许可】

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