TITLE

Reduction in critical current of current induced switching in an inhomogeneous nanomagnet

AUTHOR(S)
Wu, M. C.; Aziz, A.; Ali, M.; Marrows, C. H.; Hickey, B. J.; Barber, Z. H.; Blamire, M. G.
PUB. DATE
March 2009
SOURCE
Applied Physics Letters;3/23/2009, Vol. 94 Issue 12, p122511
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report low current-density switching of pseudospin valve nanopillars fabricated by a three-dimensional focused ion beam lithography. Simulations using the Landau–Liftshitz–Gilbert equation with Slonczewski spin transfer torque term demonstrate that magnetostatic coupling combined with an in-plane applied field results in a strongly inhomogeneous magnetization, which is close to the point of switching in both parallel and antiparallel configurations and so significantly reduced switching currents are possible.
ACCESSION #
37259534

 

Related Articles

  • Local investigation of the energy gap within the incompressible strip in the quantum Hall regime. Deviatov, E. V.; Lorke, A.; Biasiol, G.; Sorba, L.; Wegscheider, W. // JETP Letters;Sep2010, Vol. 92 Issue 1, p67 

    We experimentally study the energy gap within the incompressible strip at local filling factor ν = 1 at the quantum Hall edge for samples of very different mobilities. The obtained results indicate strong enhancement of the energy gap in comparison to the single-particle Zeeman splitting. We...

  • Effect of nonadiabatic spin transfer torque on domain wall resonance frequency and mass. Jamali, Mahdi; Lee, Kyung-Jin; Yang, Hyunsoo // Applied Physics Letters;2/28/2011, Vol. 98 Issue 9, p092501 

    The dynamics of a magnetic domain wall in a semi circular nanowire loop is studied by an analytical model and micromagnetic simulations. We find a damped sinusoidal oscillation of the domain wall for small displacement angles around its equilibrium position under an external magnetic field in...

  • Numerical simulation of the electron capture process in a magnetar interior. Gao, Z.; Wang, N.; Yuan, J.; Jiang, L.; Song, D. // Astrophysics & Space Science;Mar2011, Vol. 332 Issue 1, p129 

    In a superhigh magnetic field, direct Urca reactions can proceed for an arbitrary proton concentration. Since only the electrons with high energy E ( E> Q, Q is the threshold energy of inverse β-decay) at large Landau levels can be captured, we introduce the Landau level effect coefficient q...

  • Semiclassical quantization condition for magnetic energy levels of electrons in metals with... Mikitik, G.P.; Sharlai, Yu.V. // Low Temperature Physics;Feb99, Vol. 25 Issue 2, p126 

    Investigates the semiclassical quantization condition for magnetic energy levels of electrons in metals with band-contact lines. Origin of the refined condition; Manifestation of the predicted shift in oscillation; Common basis for the analysis of physical phenomena in metals.

  • Semiclassical energy levels of electrons in metals with band degeneracy lines. Mikitik, G. P.; Sharlaı, Yu. V. // Journal of Experimental & Theoretical Physics;Oct98, Vol. 87 Issue 4, p747 

    We show that in calculating the semiclassical energy levels of electrons in metals located in a magnetic field, one must determine whether or not the corresponding electron paths in the space of wave vectors k are attached to a band degeneracy line. Calculations in the two possible cases, i.e.,...

  • The influence of classical resonances on quantum energy levels. Ramachandran, B.; Kay, Kenneth G. // Journal of Chemical Physics;9/1/1993, Vol. 99 Issue 5, p3659 

    In this paper, we examine the behavior of the quantum energy levels of a coupled oscillator system as the zero-order frequencies are varied to carry the corresponding classical system through a resonance. We find that the levels exhibit a pattern that is characteristic of the resonance. This...

  • Recording performance of high-density patterned perpendicular magnetic media. Albrecht, M.; Rettner, C. T.; Moser, A.; Best, M. E.; Terris, B. D. // Applied Physics Letters;10/7/2002, Vol. 81 Issue 15, p2875 

    Isolated tracks of magnetic single-domain islands have been fabricated by patterning perpendicular Co[SUB70]Cr[SUB18]Pt[SUB12] continuous films using focused-ion-beam lithography, reaching areal densities as high as ∼200 Gbit/in[SUP2]. We demonstrate writing and reading of individual...

  • Simulation of irreversible processes in nonisothermal systems. Saihanov, M. // High Temperature;Nov2006, Vol. 44 Issue 6, p871 

    The possibility is demonstrated of simulating irreversible processes in nonisothermal systems using a unified variational principle. In the first stage, a thermodynamic description is made of quasi-equilibrium systems for which the parameters of inverse temperatures βj and of the rates of...

  • Kernel Polynomial Method on GPU. Zhang, Shixun; Yamagiwa, Shinichi; Okumura, Masahiko; Yunoki, Seiji // International Journal of Parallel Programming;Feb2013, Vol. 41 Issue 1, p59 

    The simulation of lattice model systems for quantum materials is one of the most important approaches to understand quantum properties of matter in condensed matter physics. The main task in the simulation is to diagonalize a Hamiltonian matrix for the system and evaluate the electronic density...

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