Demonstration of multilevel cell spin transfer switching in MgO magnetic tunnel junctions

Xiaohua Lou; Zheng Gao; Dimitrov, Dimitar V.; Tang, Michael X.
December 2008
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p242502
Academic Journal
Multilevel cell is an important concept to improve the density of spin transfer torque memory. We demonstrated two-bit multilevel cell spin transfer switching using MgO-based magnetic tunnel junctions. Two types of cell structural design are discussed. Multiple resistance levels are depicted in a current-driven spin transfer switching loop, which shows a switching current density of ∼2×106 A/cm2. Reversible transitions between high and low states of the soft bit are achieved using minor-loop spin transfer switching. The influence of external magnetic field to spin transfer switching is also discussed.


Related Articles

  • Whistler waves in plasmas with magnetic field irregularities: Experiment and theory. Gushchin, M. E.; Zaboronkova, T. M.; Koldanov, V. A.; Korobkov, S. V.; Kostrov, A. V.; Krafft, C.; Strikovsky, A. V. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p023504 

    The properties of whistler waves propagating in a large laboratory magnetoplasma with magnetic field irregularities have been studied. Two types of ambient magnetic field inhomogeneities have been considered: (i) a localized “lenslike” perturbation and (ii) an elongated...

  • The role of the Weibel instability at the reconnection jet front in relativistic pair plasma reconnection. Zenitani, S.; Hesse, M. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022101 

    The role of the Weibel instability is investigated for the first time in the context of the large-scale magnetic reconnection problem. A late-time evolution of magnetic reconnection in relativistic pair plasmas is demonstrated by particle-in-cell simulations. In the outflow regions, powerful...

  • Study of magnetic configuration effects on plasma boundary and measurement of edge electron density in the spherical tokamak compact plasma wall interaction experimental device using Li sheet beam. Bhattacharyay, R.; Zushi, H.; Morisaki, T.; Inada, Y.; Kikukawa, T.; Watanabe, S.; Sasaki, K.; Ryoukai, T.; Hasegawa, M.; Hanada, K.; Sato, K. N.; Nakamura, K.; Sakamoto, M.; Idei, H.; Yoshinaga, T.; Kawasaki, S.; Nakashima, H.; Higashijima, A. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022504 

    Two-dimensional lithium beam imaging technique has been applied in the spherical tokamak CPD (compact plasma wall interaction experimental device) to study the effects of magnetic field configurations on rf plasma boundary in the absence of any plasma current, and also for the measurement of a...

  • Turbulent transport coefficients and residual energy in mean-field dynamo theory. Hamba, Fujihiro; Sato, Hisanori // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022302 

    The turbulent electromotive force in the mean-field equation needs to be modeled to predict a large-scale magnetic field in magnetohydrodynamic turbulence at high Reynolds number. Using a statistical theory for inhomogeneous turbulence, model expressions for transport coefficients appearing in...

  • Scaling of the peak magnetic reconnection rate in the inviscid Taylor problem. Fitzpatrick, R. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p024503 

    A dispute regarding the scaling of the peak magnetic reconnection rate in the inviscid Taylor problem for ka<1 is resolved.

  • Dual analog switch targets portable equipment.  // EDN;10/14/2004, Vol. 49 Issue 21, p122 

    This article presents information on the bidirectional, low-resistance 1SL4684 dual-SPDT analog switch from Intersil Corp. This product operates over a 1.65 to 3.6 Volts supply range. It features on-resistance of 0.29Ω at 2.7 Volts and 0.40Ω at 1.8 Volt. When operated from a 2.7 Volts...

  • Novel hybrid optically bistable switch: The quantum well self-electro-optic effect device. Miller, D. A. B.; Chemla, D. S.; Damen, T. C.; Gossard, A. C.; Wiegmann, W.; Wood, T. H.; Burrus, C. A. // Applied Physics Letters;1984, Vol. 45 Issue 1, p13 

    We report a new type of optoelectronic device, a self-electro-optic effect device (SEED), which uses the same GaAs/GaAlAs multiple quantum well material simultaneously as an optical detector and modulator. Using a series resistor and constant voltage bias supply the SEED shows optical bistabilty...

  • The Technology Study of New Asymmetrical Half-Bridge Converter. Yuefen Wu // Advanced Materials Research;2014, Vol. 986-987, p1884 

    Because the shortcomings of the common asymmetrical half-bridge circuit can't achieve soft switch and has DC bias for the transformer, the paper studies a new asymmetrical half-bridge circuit. Compared with the traditional asymmetrical half-bridge circuit, the circuit is added an auxiliary...

  • The Effect of Field Representation on Student Responses to Magnetic Force Questions. Scaife, Thomas M.; Heckler, Andrew F. // AIP Conference Proceedings;11/12/2007, Vol. 951 Issue 1, p180 

    We examine student understanding of the magnetic force exerted on a charged particle and report three findings from a series of tests administered to introductory physics students. First, we expand on previous findings that many students believe in “charged” magnetic poles and find...


Read the Article


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

Try another library?
Sign out of this library

Other Topics