TITLE

Decrease of nonlinearity and linewidth narrowing in spin-transfer oscillators under the external field applied near the hard axis

AUTHOR(S)
Mizushima, K.; Nagasawa, T.; Kudo, K.; Saito, Y.; Sato, R.
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/13/2009, Vol. 94 Issue 15, p152501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Angular dependence of power spectra is measured for tunnel-type spin-transfer oscillators by changing the direction of the external field in the plane. The oscillation frequency shows the red shift with increasing the current in the case that the field directions are away from the hard axis of the free layer. The frequency shift changes from red to blue at a specific direction near the hard axis, where the linewidth is much reduced. These results are explained by taking into account the nonlinearity arising from the in-plane anisotropy as well as that arising from the demagnetizing effect.
ACCESSION #
37831865

 

Related Articles

  • Searching for Galactic sources in the Swift GRB catalog: Statistical analyses of the angular distributions of FREDs. Tello, J. C.; Castro-Tirado, A. J.; Gorosabel, J.; Pérez-Ramírez, D.; Guziy, S.; Sánchez-Ramírez, R.; Jelínek, M.; Bagoly, Z. // Astronomy & Astrophysics / Astronomie et Astrophysique;Nov2012, Vol. 548, p1 

    Context. Since the early 1990s, gamma ray bursts (GRB) have been accepted to be of extra-Galactic origin because of the isotropic distribution observed by BATSE and the redshifts observed via absorption line spectroscopy. Nevertheless, upon closer examination at least one case turned out to be...

  • Formation of cold fronts in mergers of massive galaxy clusters. Mathis, H.; Lavaux, G.; Diego, J. M.; Silk, J. // AIP Conference Proceedings;2004, Vol. 703 Issue 1, p391 

    Using adiabatic cosmological simulations of the intracluster plasma, we follow the evolution of two symmetric cold fronts developing in the remnant of a violent z=0.3 massive cluster merger. The simulated cold fronts are very similar to those recently singled out in X-ray observations of the...

  • Redshifts and Compton attenuation. Brainerd, J. J.; Preece, R. D. // AIP Conference Proceedings;2000, Vol. 526 Issue 1, p480 

    A number of gamma-ray bursts have spectra that are accurately fit by a Compton attenuated power-law spectrum. One free parameter in this spectral model is the cosmological redshift of the gamma-ray burst. From the fitting of this model to burst spectra observed with BATSE, values of z of order...

  • Tunnel diode oscillator application to high sensitivity de Haas–van Alphen and superconducting critical field studies of anisotropic organic conductors. Athas, G. J.; Brooks, J. S.; Klepper, S. J.; Uji, S.; Tokumoto, M. // Review of Scientific Instruments;Nov93, Vol. 64 Issue 11, p3248 

    We report the first application of a tunnel diode circuit to investigate the de Haas-van Alphen effect and superconducting critical field valnes in small single crystal organic conductors. The materials of interest are in the family of charge transfer salts (BEDT-TTF)[sub 2]X, where X is one of...

  • Measuring radio frequency properties of materials in pulsed magnetic fields with a tunnel diode oscillator. Coffey, T.; Bayindir, Z.; DeCarolis, J. F.; DeCarolis, J.F.; Bennett, M.; Esper, G.; Agosta, C. C.; Agosta, C.C. // Review of Scientific Instruments;Dec2000, Vol. 71 Issue 12 

    Tunnel diode oscillators have been used in many types of experiments that measure the properties of materials. We present the details of an apparatus that extend these tunnel diode techniques to measure the properties of materials in pulsed magnetic fields. In the most common version of this...

  • Optically induced relaxation of anisotropically strained M-plane GaN films on LiAlO2. Flissikowski, T.; Brandt, O.; Misra, P.; Grahn, H. T. // Journal of Applied Physics;Sep2008, Vol. 104 Issue 6, p063507 

    We study the anisotropic in-plane strain in M-plane GaN films on LiAlO2 by using photoreflectance, photoluminescence, Raman, and time-resolved pump-and-probe spectroscopy. We find a partial and anisotropic relaxation of these highly strained films under intense optical pumping. The strain...

  • Nonlinear response of a harmonically driven oscillator in magnetic field. Przybyłowicz, Piotr; Szmidt, Tomasz // Archives of Control Sciences;Mar2010, Vol. 20 Issue 1, p19 

    The paper presents analysis of nonlinear response of a classical mechanical oscillator placed within a magnetic field and driven by a harmonic force. With an appropriate choice of control parameters, the system vibrates chaotically between different equilibrium positions. To prove this result,...

  • Magnetic �Doublets� in M�ssbauer Spectra of Superparamagnetic Particles. Afanas�ev, A. M.; Chuev, M. A. // JETP Letters;4/25/2003, Vol. 77 Issue 8, p415 

    It is shown that the M�ssbauer magnetic hfs spectra of a superparamagnetic particle are cardinally affected by the rotation of its magnetic moment about the magnetic anisotropy field. This rotation renormalizes the nuclear g factors and qualitatively transforms the spectra. In particular,...

  • Large tunnel magnetoresistance with plasma oxidized MgO barrier. Dimopoulos, T.; Gieres, G.; Wecker, J.; Wiese, N.; Luo, Y.; Samwer, K. // Journal of Applied Physics;10/1/2005, Vol. 98 Issue 7, p073705 

    This work focuses on magnetic tunnel junctions with a polycrystalline MgO barrier, prepared by plasma oxidation. Combined with Co50Fe50 ferromagnetic electrodes, a large tunnel magnetoresistance (TMR) of 60% is obtained at room temperature. The TMR effect is comparable to state-of-the-art Al...

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