Multistable switching due to magnetic vortices pinned at artificial pinning sites

Rahm, M.; Stahl, J.; Wegscheider, W.; Weiss, D.
August 2004
Applied Physics Letters;8/30/2004, Vol. 85 Issue 9, p1553
Academic Journal
Magnetic vortices form the ground state in micron and submicron ferromagnetic disks. By inserting artificial defects (antidots) into a submicron ferromagnetic disk, magnetic vortices can be pinned controllably thus enabling a different way for magnetic switching. We show that by inserting n antidots into a disk magnetization reversal takes place via n-1 jumps of the vortex core between neighboring antidots. This cannot only be used to establish stable two-state switching for n=2, but also to realize a multilevel remanent state with low switching fields.


Related Articles

  • Effect of the inner structure of domain walls on the stability of an isolated stripe domain in a pulsed field. Dzhezherya, Yu. I. // Journal of Experimental & Theoretical Physics;Nov99, Vol. 89 Issue 5, p916 

    This paper studies the effect of the inner structure of domain walls on the stability of an isolated stripe domain localized in a thin ferromagnetic film against a pulse of magnetic field applied perpendicularly to the film surface. It is found that the value of the critical amplitude of the...

  • Large cyclic deformation of a Ni-Mn-Ga shape memory alloy induced by magnetic fields. Müllner, P.; Chernenko, V. A.; Wollgarten, M.; Kostorz, G. // Journal of Applied Physics;12/1/2002, Vol. 92 Issue 11, p6708 

    A single-crystalline ferromagnetic Ni-Mn-Ga shape memory specimen was deformed in the martensitic state by uniaxial compression to a total strain of 2%. The stress-strain curve displays a yield point at 6 MPa followed by jerky flow. After mechanical deformation, magnetomechanical tests in a...

  • Simulating realistic implementations of spin field effect transistor. Gao, Yunfei; Lundstrom, Mark S.; Nikonov, Dmitri E. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07C306 

    The spin field effect transistor (spinFET), consisting of two ferromagnetic source/drain contacts and a Si channel, is predicted to have outstanding device and circuit performance. We carry out a rigorous numerical simulation of the spinFET based on the nonequilibrium Green's function formalism...

  • Dynamic response of a mesoscopic antiferromagnetic particle to an ac magnetic field. Golyshev, V. Yu.; Popkov, A. F. // Physics of the Solid State;Jul97, Vol. 39 Issue 7, p1100 

    Calculations are made for the dynamic susceptibility of a weakly ferromagnetic mesoparticle in the macroscopic quantum coherence region and the probability of conservation of the initial polarized state in a pulsed magnetic field.

  • Spintronics: Field-free ringing of nanomagnets. Silva, Thomas J. // Nature Physics;Jul2007, Vol. 3 Issue 7, p447 

    The article discusses the exploration of magnetization control without any extra magnetic fields. Key issues examined include the use of magnetic fields to change the magnetic orientation of ferromagnets, as well as studies on the field-free ringing of nanomagnets. The issues' implications for...

  • Switching of saturation magnetization by carrier injection in YBa2Cu3O7-δ/α-Fe2O3/Nb-SrTiO3 junctions. Yuansha Chen; Guijun Lian; Guangcheng Xiong; Venkatesan, T. // Applied Physics Letters;6/6/2011, Vol. 98 Issue 23, p232513 

    Ferromagnetic (FM) α-Fe2O3 layers were deposited on n-type oxide semiconductor substrates of Nb-doped SrTiO3 (NSTO) to form YBa2Cu3O7-δ/α-Fe2O3/NSTO junctions. Multilevel resistance switching behavior was observed in YBa2Cu3O7-δ/α-Fe2O3/NSTO junctions with stable resistive states....

  • Thin-film magnetic patterns in an external field. Bryant, Paul; Suhl, Harry // Applied Physics Letters;5/29/1989, Vol. 54 Issue 22, p2224 

    The behavior of ideally soft ferromagnetic films in the presence of a weak coplanar magnetic field is explored by the method of characteristics. Solutions are found which have no internal field or in some cases have field-free zones. Results are specifically given for circular and elliptic...

  • Spiral Vortices in Ferromagnets. Borisov, A. B. // JETP Letters;3/10/2001, Vol. 73 Issue 5, p242 

    New types of magnetic defects in two-dimensional ferromagnets are found in the exchange approximation, and the influence of magnetic anisotropy on their structure is analyzed. � 2001 MAIK �Nauka / Interperiodica�.

  • Photothermally modulated stray field imaging of magnetic materials. Hoppstadter, D.; Netzelmann, U. // Applied Physics Letters;7/25/1994, Vol. 65 Issue 4, p499 

    Presents a technique for ferromagnetic material imaging using photothermally modulated stray fields of the surfaces. Use of focused laser beam heating; Measurement of magnetic flux changes; Lateral resolution of the images achieved.


Read the Article


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

Try another library?
Sign out of this library

Other Topics