TITLE

Room temperature ferromagnetism in pristine MgO thin films

AUTHOR(S)
Araujo, C. Moyses; Kapilashrami, Mukes; Xu Jun; Jayakumar, O. D.; Nagar, Sandeep; Yan Wu; Århammar, Cecilia; Johansson, Börje; Belova, Lyubov; Ahuja, Rajeev; Gehring, Gillian A.; Rao, K. V.
PUB. DATE
June 2010
SOURCE
Applied Physics Letters;6/7/2010, Vol. 96 Issue 23, p232505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Robust ferromagnetic ordering at, and well above room temperature is observed in pure transparent MgO thin films (<170 nm thick) deposited by three different techniques. Careful study of the wide scan x-ray photoelectron spectroscopy rule out the possible presence of any magnetic contaminants. In the magnetron sputtered films, we observe magnetic phase transitions as a function of film thickness. The maximum saturation magnetization of 5.7 emu/cm3 is measured on a 170 nm thick film. The films above 500 nm are found to be diamagnetic. Ab initio calculations suggest that the ferromagnetism is mediated by cation vacancies.
ACCESSION #
51378930

 

Related Articles

  • Multiferroic properties of Pb(Zr,Ti)O3/CoFe2O4 composite thin films. Ortega, N.; Bhattacharya, P.; Katiyar, R. S.; Dutta, P.; Manivannan, A.; Seehra, M. S.; Takeuchi, I.; Majumder, S. B. // Journal of Applied Physics;12/15/2006, Vol. 100 Issue 12, p126105 

    In the present work we report multiferroic behavior in lead zirconate titanate (PZT)–cobalt iron oxide (CFO) composite thin films. It is found that upon annealing, the multilayered structures are intermixed at least partially, and CFO is phase separated into PZT matrix to form a composite...

  • Stoichiometry dependence and thermal stability of conducting NdGaO3/SrTiO3 heterointerfaces. Gunkel, F.; Skaja, K.; Shkabko, A.; Dittmann, R.; Hoffmann-Eifert, S.; Waser, R. // Applied Physics Letters;2/18/2013, Vol. 102 Issue 7, p071601 

    The structural and electrical properties of conducting NdGaO3/SrTiO3 (NGO/STO) heterostructures grown at various deposition temperatures were investigated. X-ray diffraction and X-ray photoelectron spectroscopy reveal a strong impact of the growth temperature on both crystallinity and cation...

  • Surface Analysis of Al Alloys with X-Ray Photoelectron and Auger Electron Spectroscopy. Masatoshi Sakairi; Ryo Sasaki; Keita Suzuki // Corrosion Engineering;Jul2015, Vol. 64 Issue 7, p236 

    In this paper, X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) were applied to investigate passive films formed on aluminum alloy in 0.5 kmol m-3 H3BO3/0.05 kmol m-3 Na2B4O7 with different metal cations. The metal cation is classified by metal cation hardness X,...

  • Room-temperature ferromagnetism in n-type Cu-doped ZnO thin films. Hou, D. L.; Ye, X. J.; Zhao, X. Y.; Meng, H. J.; Zhou, H. J.; Li, X. L.; Zhen, C. M. // Journal of Applied Physics;8/1/2007, Vol. 102 Issue 3, p033905 

    A series of n-type Cu-doped ZnO thin films was prepared by magnetron sputtering. Such films have shown ferromagnetic properties at room temperature. The Cu ion is in a univalent state as identified by x-ray photoelectron spectroscopy. The moment per Cu ion decreases as the Cu concentration...

  • Investigation of cation distribution, electrical, magnetic properties and their correlation in Mn2-xCo2xNi1-xO4 films. Jing Wu; Zhiming Huang; Wei Zhou; Cheng Ouyang; Yun Hou; Yanqing Gao; Ren Chen; Junhao Chu // Journal of Applied Physics;2014, Vol. 115 Issue 11, p113703-1 

    X-ray photoelectron spectroscopy was performed on Mn2-xCo2xNi1-xO4 (x=0.2, 0.4, 0.5, 0.6, and 0.8) series spinel films to determine their cation distributions. The results show that both Ni and Co ions exhibit bivalence, while Mn ions exhibit coexisting multivalence. The hopping frequency v0 of...

  • NO-assisted molecular-beam epitaxial growth of nitrogen substituted EuO. Wicks, R.; Altendorf, S. G.; Caspers, C.; Kierspel, H.; Sutarto, R.; Tjeng, L. H.; Damascelli, A. // Applied Physics Letters;4/16/2012, Vol. 100 Issue 16, p162405 

    We have investigated a method for substituting oxygen with nitrogen in EuO thin films, which is based on molecular beam epitaxy distillation with NO gas as the oxidizer. By varying the NO gas pressure, we produce crystalline, epitaxial EuO1-xNx films with good control over the films' nitrogen...

  • d carrier induced intrinsic room temperature ferromagnetism in Nb:TiO2 film. Yang, J. Y.; Han, Y. L.; He, L.; Dou, R. F.; Xiong, C. M.; Nie, J. C. // Applied Physics Letters;5/14/2012, Vol. 100 Issue 20, p202409 

    High crystalline anatase TiO2 and Nb:TiO2 thin films were fabricated on LaAlO3 (100) substrates by pulsed laser deposition. Room temperature ferromagnetism was obtained in Nb:TiO2 but absent in pure TiO2. The Kondo effect and anomalous Hall effect observed in metallic Nb:TiO2 strongly confirmed...

  • Another Advance on the Road to Spintronics.  // Magnetics Business & Technology;Winter2012, Vol. 11 Issue 4, p4 

    The article discusses a new technique, Hard X-ray Angle-Resolved PhotoEmission Spectroscopy (HARPES), on the origin of ferromagnetism, making reference to research by Alexander Gray and Charles Fadley and colleagues at the Lawrence Berkeley National Laboratory of the U.S. Department of Energy.

  • Structural and magnetic properties of Mn-doped anatase TiO films synthesized by atomic layer deposition. Sellers, Meredith; Seebauer, Edmund // Applied Physics A: Materials Science & Processing;Aug2011, Vol. 104 Issue 2, p583 

    Mn-doped anatase TiO (Mn: 1.2, 2.4 at%) thin films were grown on Si(100) via atomic layer deposition (ALD). The synthesis utilized Ti(OCH(CH)) and HO as ALD precursors and Mn(DPM) as a dopant source. X-ray photoelectron spectroscopy measurements indicate that Mn is successfully doped in the TiO...

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