TITLE

High-temperature ferromagnetism in pulsed-laser deposited epitaxial (Zn,Mn)O thin films: Effects of substrate temperature

AUTHOR(S)
Pradhan, A. K.; Kai Zhang; Mohanty, S.; Dadson, J. B.; Hunter, D.; Zhang, Jun; Sellmyer, D. J.; Roy, U. N.; Cui, Y.; Burger, A.; Mathews, S.; Joseph, B.; Sekhar, B. R.; Roul, B. K.
PUB. DATE
April 2005
SOURCE
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p152511
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the observation of remarkable room-temperature ferromagnetism in epitaxial (Zn,Mn)O films grown by a pulsed-laser deposition technique using high-density targets. The optimum growth conditions were demonstrated from x-ray measurements, microstructure, Rutherford backscattering, micro-Raman, and magnetic studies. Superior ferromagnetic properties were observed in (Zn,Mn)O films grown at a substrate temperature of 500 °C and with an oxygen partial pressure of 1 mTorr. Ferromagnetism becomes weaker with increasing substrate temperature due to the formation of isolated Mn clusters irrespective of higher crystalline quality of the film.
ACCESSION #
17185393

 

Related Articles

  • Inclined ZnO thin films produced by pulsed-laser deposition. Peruzzi, M.; Pedarnig, J.D.; Bäuerle, D.; Schwinger, W.; Schäffler, F. // Applied Physics A: Materials Science & Processing;2004, Vol. 79 Issue 8, p1873 

    ZnO thin films with a uniformly inclined structure are grown by pulsed-laser deposition on SrTiO3. The c-axis of ZnO films is inclined by an angle ?=20±0.5° and ?=42±0.5° against the surface normal of 25° miscut (100) SrTiO3 and (110) SrTiO3 single crystal substrates,...

  • Ferromagnetic resonance signature of metallic Co clusters in ferromagnetic ZnCoO thin films. von Bardeleben, H. J.; Jedrecy, N.; Cantin, J. L. // Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p142505 

    Highly Co-doped Zn0.7Co0.3O thin films that can be reproducibly grown ferromagnetic by pulsed laser deposition have been investigated by optical absorption and ferromagnetic resonance spectroscopy (FMR). The saturation magnetization depends strongly on the O2 content during the growth, the...

  • Ferromagnetism in Ni-doped ZnO films: Extrinsic or intrinsic? Snure, Michael; Kumar, Dhananjay; Tiwari, Ashutosh // Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p012510 

    Here we report a detailed study aimed on understanding the origin of ferromagnetism in Ni-doped ZnO films. A pulsed laser deposition technique was used to deposit Ni-doped (5 at. %) ZnO films on sapphire (0001) substrates under different oxygen pressures ranging from 10-6 to 0.1 Torr. Films were...

  • Room temperature ferromagnetism in Mn-doped ZnO films mediated by acceptor defects. Xu, Qingyu; Schmidt, Heidemarie; Hartmann, Lars; Hochmuth, Holger; Lorenz, Michael; Setzer, Annette; Esquinazi, Pablo; Meinecke, Christoph; Grundmann, Marius // Applied Physics Letters;8/27/2007, Vol. 91 Issue 9, p092503 

    Mn-doped ZnO films with preferred c-axis growth orientation were prepared by pulsed laser deposition under N2 atmosphere on a-plane sapphire substrates. Large positive magnetoresistance amounting to 60% was observed at 5 K. Clear anomalous Hall effect was observed at 20 K. Ferromagnetism with...

  • Room temperature transparent ferromagnetism in 200 keV Ni2+ ion implanted pulsed laser deposition grown ZnO/sapphire film. Pandey, B.; Ghosh, S.; Srivastava, P.; Kumar, P.; Kanjilal, D.; Zhou, S.; Schmidt, H. // Journal of Applied Physics;Jan2010, Vol. 107 Issue 2, p023901 

    Intrinsic ferromagnetism at room temperature has been observed in ZnO/sapphire films by implantation of 200 keV Ni2+ ions with fluences 6×1015, 8×1015, 1×1016, and 2×1016 ions/cm2. Crystalline phases are identified by glancing angle x-ray diffraction, which shows no extra phase...

  • High electron mobility of phosphorous-doped homoepitaxial ZnO thin films grown by pulsed-laser deposition. Brandt, Matthias; von Wenckstern, Holger; Schmidt, Heidemarie; Rahm, Andreas; Biehne, Gisela; Benndorf, Gabriele; Hochmuth, Holger; Lorenz, Michael; Meinecke, Christoph; Butz, Tilman; Grundmann, Marius // Journal of Applied Physics;Jul2008, Vol. 104 Issue 1, p013708 

    The transport properties of phosphorous-doped ZnO thin films, grown by pulsed-laser deposition on thermally pretreated hydrothermally grown ZnO single-crystal substrates, are reported. The ZnO:P thin films show very good morphological and structural properties as confirmed by atomic force...

  • Magnetic and Raman scattering studies of Co-doped ZnO thin films grown by pulsed laser deposition. Aravind, Arun; Hasna, K.; Jayaraj, M.; Kumar, Mukesh; Chandra, Ramesh // Applied Physics A: Materials Science & Processing;Jun2014, Vol. 115 Issue 3, p843 

    Phase pure ZnCoO thin films grown by pulsed laser deposition have transmittance greater than 75 % in the visible region. Raman studies confirm the crystalline nature of ZnCoO thin films. ZnCoO thin films show room temperature ferromagnetism with saturation magnetization of 0.4 μ/Co atom. The...

  • Chemical states and ferromagnetism in heavily Mn-substituted zinc oxide thin films. Q. Shao; P. S. Ku; X. L. Wang; J. A. Zapien; C. W. Leung; Borgatti, F.; Gambardella, A.; Dediu, V.; Ciprian, R.; Ruotolo, A. // Journal of Applied Physics;2014, Vol. 115 Issue 15, p153902-1 

    A concentration of Manganese as high as 8% was successfully diluted into Zinc Oxide epitaxial films deposited by pulsed laser deposition. The films showed strong ferromagnetism with a large coercivity. Low temperature X-ray absorption spectroscopy measurements indicated that all the Manganese...

  • The Intrinsic Room-Temperature Ferromagnetism in ZnO:Co Thin Films Deposited by PLD. Wang, C.C.; Man, B. Y.; Liu, M.; Chen, C. S.; Jiang, S. Z.; Yang, S. Y.; Xu, S. C.; Gao, X. G.; Hu, B. // Advances in Condensed Matter Physics;2012, p1 

    c-axis preferential orientated ZnO:Co thin films were synthesized on c-plane sapphire substrates by using pulsed laser deposition (PLD) technique in an oxygen-deficient ambient. X-ray diffraction spectra, scanning electron microscopy, X-ray photoelectron spectroscopy, energy dispersive...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics