A frequency-controlled magnetic vortex memory

Pigeau, B.; de Loubens, G.; Klein, O.; Riegler, A.; Lochner, F.; Schmidt, G.; Molenkamp, L. W.; Tiberkevich, V. S.; Slavin, A. N.
March 2010
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p132506
Academic Journal
Using the ultralow damping NiMnSb half-Heusler alloy patterned into vortex-state magnetic nanodots, we demonstrate a concept of nonvolatile memory controlled by the frequency. A perpendicular bias magnetic field is used to split the frequency of the vortex core gyrotropic rotation into two distinct frequencies, depending on the sign of the vortex core polarity p=±1 inside the dot. A magnetic resonance force microscope and microwave pulses applied at one of these two resonant frequencies allow for local and deterministic addressing of binary information (core polarity).


Related Articles

  • Stability characteristics of the low-temperature ferrimagnetism in the Mn2-xZnxSb system. Val'kov, V. I.; Golovchan, A. V.; Bribanov, I. F.; Kamenev, V. I.; Iesenchuk, O. O.; Sivachenko, A. P.; Kabdin, N. N. // Low Temperature Physics;Jan2007, Vol. 33 Issue 1, p70 

    The magnetic properties of the system Mn2-xZnxSb are investigated experimentally in static and pulsed magnetic fields. It is found that the spontaneous first-order transitions from the ferro=imagnetic phase Fi to the weakly ferrimagnetic phase If which are observed on decreasing temperature in...

  • Magnetic properties and large magnetic-field-induced strains in off-stoichiometric Ni-Mn-Al Heusler alloys. Fujita, A.; Fukamichi, K.; Gejima, F.; Kainuma, R.; Ishida, K. // Applied Physics Letters;11/6/2000, Vol. 77 Issue 19 

    Magnetic properties and magnetic-field-induced strains (MFIS) have been investigated for off-stoichiometric Ni-Mn-Al Heusler alloys with an ordered L2[sub 1] structure. A clear martensitic transformation in Ni[sub 53]Mn[sub 25]Al[sub 22] alloy was revealed below the Curie temperature. In the...

  • Solidified microstructure evolution of Mn-Sb near-eutectic alloy under high magnetic field conditions. Qiang Wang; Ao Gao; Tie Liu; Feng Liu; Chao Zhang; Jicheng He // Journal of Materials Research;Jul2009, Vol. 24 Issue 7, p22 

    Mn-90.8 wt%Sb alloys were solidified without and with high magnetic fields to investigate the effects of high magnetic fields on the structure evolution of the alloys. It was found that there were only MnSb/Sb eutectics without any primary phase in the alloy at 0 T, whereas a small amount of...

  • Dependence of domain wall stability on vortex chirality in asymmetric nanoring. Wang, X. H.; Goolaup, S.; Lew, W. S. // Applied Physics Letters;10/4/2010, Vol. 97 Issue 14, p142504 

    We report on the direct observation of notch-free domain wall (DW) trapping and field history effect on the DW behavior in Ni80Fe20 asymmetric ring. We found that a 360° DW is trapped at the narrow arm while the ring adopts a vortex configuration. The stability of DW is dependent on the...

  • Frequency-selective control of ferromagnetic resonance linewidth in magnetic multilayers. Schäfer, S.; Pachauri, N.; Mewes, C. K. A.; Mewes, T.; Kaiser, C.; Leng, Q.; Pakala, M. // Applied Physics Letters;1/16/2012, Vol. 100 Issue 3, p032402 

    We report on a frequency-specific linewidth broadening of the ferromagnetic resonance (FMR) mode of a NiFe free layer within a magnetic multilayer stack. The FMR studies reveal a significant broadening of the FMR linewidth of the free layer at frequencies where this resonance is degenerate with...

  • Low-field inverse magnetocaloric effect in Ni50-xMn39+xSn11 Heusler alloys. Han, Z. D.; Wang, D. H.; Zhang, C. L.; Xuan, H. C.; Gu, B. X.; Du, Y. W. // Applied Physics Letters;1/22/2007, Vol. 90 Issue 4, p042507 

    The low-field magnetic entropy changes in Ni50-xMn39+xSn11 alloys (x=5, 6, and 7) were investigated. The martensitic transition shifts to lower temperature with the increase of Mn concentration. Under an applied magnetic field of 10 kOe, the magnetic entropy changes are 6.8, 10.1, and 10.4 J/kg...

  • Prospects of nanostructures Bi1-XSbx for thermoelectricity. Nikolaeva, Albina A.; Konopko, Leonid A.; Huber, Tito E.; Bodiul, Pavel P.; Popov, Ivan A. // AIP Conference Proceedings;6/26/2012, Vol. 1449 Issue 1, p295 

    There is renewed focus on the thermoelectric properties of Bi-Sb. Reduced dimensionality samples of these alloys, such as nanowires, may exhibit exotic behavior that relate to the properties of the surfaces of topological insulators. It has been predicted that surface states of topological...

  • Synthesis and Electronic Properties of Thermoelectric and Magnetic Nanoparticle Composite Materials. Koyano, Mikio; Kito, Daichi; Sakai, Kengo; Ariga, Tomoki // Journal of Electronic Materials;May2011, Vol. 40 Issue 5, p1078 

    pplication of a magnetic field greatly enhances the thermoelectric efficiency of bismuth-antimony (Bi-Sb) alloys. We synthesized a hybrid of Bi-Sb alloy and magnetic nanoparticles, expecting improvement of the thermoelectric performance due to the magnetic field generated by the nanoparticles....

  • Formation of chainlike structures in an Mn-89.7 wt%Sb alloy during isothermal annealing process in the semisolid state in a high magnetic field. Tie Liu; Qiang Wang; Chao Zhang; Ao Gao; Donggang Li; Jicheng He // Journal of Materials Research;Jul2009, Vol. 24 Issue 7, p21 

    This study is concerned with the investigation of the structural evolution occurring during isothermal annealing of an Mn-89.7 wt%Sb alloy in a high magnetic field in the semisolid state. The alloy specimens were isothermally annealed without and with an 11.5-T magnetic field for various...


Read the Article


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

Try another library?
Sign out of this library

Other Topics