TITLE

Magnetization relaxation and structure of CoFeGe alloys

AUTHOR(S)
Lee, H.; Wang, Y.-H. A.; Mewes, C. K. A.; Butler, W. H.; Mewes, T.; Maat, S.; York, B.; Carey, M. J.; Childress, J. R.
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p082502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetic relaxation of 10 and 50 nm thin films of (CoFe)100-xGex (0 at. %≤x≤35 at. %) alloys was investigated by broadband ferromagnetic resonance (FMR) experiments. 10 nm thin films exhibit a significant two magnon contribution to the FMR linewidth. The 50 nm films exhibit very low damping constants of α≈0.0025 and relaxation rates as low as 33 MHz in the composition range of 20 at. %≤x≤30 at. % Ge after annealing. Structural characterization revealed B2 order for these compositions. First principles calculations confirm a pseudogap in the minority channel for B2 ordered (CoFe)75Ge25 which may cause the low damping parameters and high ΔRA in CoFeGe based current perpendicular to the plane giant magnetoresistance spin valves.
ACCESSION #
43944910

 

Related Articles

  • Spatial homogeneity of thin films of colossal magnetoresistance materials by scanning... Schurig, David; Vier, D.C. // Journal of Applied Physics;4/17/1997, Vol. 81 Issue 8, p5495 

    Presents an abstract of the paper `Spatial Homogeneity of Thin Films of Colossal Magnetoresistance Materials by Scanning Ferromagnetic Resonance,' presented by David Schurig, D.C. Vier, et al, at the American Institute of Physics' 1997 Conference on Magnetism and Magnetic Materials.

  • Modeling giant magnetoresistance and magnetization of Ag1-xNix-yFey heterogeneous alloy films (abstract). Wiggins, J.; Watson, M. L.; Gago-Sandoval, P. A.; Batlle, X.; Badia, F.; Labarta, A. // Journal of Applied Physics;4/15/1996, Vol. 79 Issue 8, p5605 

    Presents an abstract of the study 'Modeling Giant Magnetoresistance and Magnetization of Ag[sub1-x]Ni[subx-y]Fe[suby] Heterogeneous Alloy Films,' by J. Wiggins, M.L. Watson, P.A. Gago-Sandoval, X. Batlle, F. Badia and A. Labarta.

  • Magnetization Dynamics under Nonlinear Ferromagnetic Resonance Conditions in a (111) Film. Shutyı, A. M.; Sementsov, D. I. // Physics of the Solid State;Aug2001, Vol. 43 Issue 8, p1499 

    The equation of motion of magnetization of a garnet ferrite (111) film is solved numerically. It is shown that different regimes of the resonance precession of magnetization are realized depending on the bias and microwave fields; the regimes differ in amplitude and in the shape of their...

  • Determination of surface magnetic profiles of thin Permalloy films using ferromagnetic resonance (abstract). Ounadjela, K.; Speriosu, V. S.; Alexopoulos, P. S. // Journal of Applied Physics;5/1/1990, Vol. 67 Issue 9, p5534 

    Presents an abstract of the study 'Determination of Surface Magnetic Profiles of Thin Permalloy films Using Ferromagnetic Resonance,' by K. Ounadjela, V.S. Speriosu and P.S. Alexopoulos.

  • Magnetization and FMR studies in amorphous Co-Fe-Nb films. Krishnan, R.; Saint Martin, F.; Sztern, J.; Ounadjela, K. // Journal of Applied Physics;4/15/1987, Vol. 61 Issue 8, p4179 

    Presents a study on the magnetization and ferromagnetic resonance in amorphous Co[sub87]Fe[sub2]Nb[sub11] films. Characteristics of such films which make them a potential candidate for realizing thin film heads; Description of magnetic properties of samples prepared in a magnetic field under...

  • Spin orientation driven static and dynamic magnetic process in amorphous FeCoBSi thin films. Peiheng Zhou; Xiaojia Luo; Li Zhang; Haipeng Lu; Jianliang Xie; Longjiang Deng // Journal of Applied Physics;6/7/2015, Vol. 117 Issue 21, p213906-1 

    The spin orientation dependence of magnetic hysteresis and microwave ferromagnetic resonance data are investigated in FeCoBSi amorphous thin films. Demagnetization effect allows the weak interface-rooted out-of-plane anisotropy to build up local spin orientation domains under the dominant...

  • Magnetic Properties and Electronic Structure of NiFe/Zr Multilayer Films. Yamkane, Z.; Lassri, H.; Omari, N.; Hlil, E. // Journal of Superconductivity & Novel Magnetism;Jul2012, Vol. 25 Issue 5, p1489 

    Magnetic properties of NiFe/Zr multilayer films, prepared by DC magnetron sputtering, have been studied by vibrating sample magnetometer and ferromagnetic resonance (FMR). Spin-wave resonances were observed in NiFe/Zr multilayer films in FMR experiments, and the spin wave was found to be...

  • Characteristic field angular dependence of magnetization switching assisted by spin wave excitation. Seki, Takeshi; Hotta, Kyoko; Imamura, Hiroshi; Nozaki, Yukio; Takanashi, Koki // Applied Physics Letters;9/16/2013, Vol. 103 Issue 12, p122403 

    We found the characteristic dependence of magnetization switching assisted by spin wave excitation on the magnetic field angle (θ) for exchange-coupled L10-FePt/Permalloy bilayers, where θ was the angle from the easy magnetization axis of L10-FePt. Without the spin wave being excited, an...

  • Low magnetisation alloys for in-plane spin transfer torque devices. Oguz, K.; Ozdemir, M.; Dur, O.; Coey, J. M. D. // Journal of Applied Physics;Jun2012, Vol. 111 Issue 11, p113904 

    Magnetic properties of thin films of three in-plane alloy systems, namely, Co40Ni40-xCrxB20, Co40Fe40-xNixB20, and Co40Fe40-xCrxB20 are investigated with a view to reducing the critical current density (jc) for spin transfer torque switching in MgO barrier magnetic tunnel junction nanopillars....

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