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  • 1
    Electronic Resource
    Electronic Resource
    Ultrafast generation of magnetic fields in a Schottky diode (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 414 (2001), S. 51-54 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For the development of future magnetic data storage technologies, the ultrafast generation of local magnetic fields is essential. Subnanosecond excitation of the magnetic state has so far been achieved by launching current pulses into micro-coils and micro-striplines and by using high-energy ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35102026
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic vortex core reversal by excitation with short bursts of an alternating field (2006)
    [s.l.] : Nature Publishing Group
    Nature 444 (2006), S. 461-464 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The vortex state, characterized by a curling magnetization, is one of the equilibrium configurations of soft magnetic materials and occurs in thin ferromagnetic square and disk-shaped elements of micrometre size and below. The interplay between the magnetostatic and the exchange energy ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature05240
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  • 3
    Electronic Resource
    Electronic Resource
    Applied physics Speed limit ahead (2004)
    [s.l.] : Nature Publishing Group
    Nature 428 (2004), S. 808-809 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In magnetic recording, information ‘bits’ are stored in regions of a magnetic material as opposite magnetizations or spins, corresponding to the values ‘1’ and ‘0’. High information density is a major requirement, but even the highest density is useless if the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/428808a
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  • 4
    Electronic Resource
    Electronic Resource
    Nonlinear timing shift in high frequency magnetic recording determined with time resolved Kerr microscopy (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 3377-3381 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: As we move to higher data rates and higher areal densities, nonlinear effects start to determine the data patterns written on a hard disk. In this context it is necessary to develop methods that can help to determine the origin of nonlinear effects, e.g., that can help to distinguish between nonlinear effects caused by areal density from transient effects caused by high data rates. In this article we concentrate on the latter and show data for nonlinear timing shift measured directly on the air bearing surface of recording heads by means of time resolved magneto-optical Kerr microscopy. We compare the data to a simple t/(t+τ) model for the head field rise time. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371216
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  • 5
    Electronic Resource
    Electronic Resource
    Spin-dependent electron interferometry (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 7142-7143 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We use interference of electron waves in a quantum well to switch the spin polarization of electrons. The spin quantum resonator consists of a Cu-film of variable thickness sandwiched between vacuum and a magnetic Co-film. Electrons are injected into the resonator from the vacuum side. The Co-film provides a spin dependent reflector. Varying the resonator thickness results in periodic modulation of the spin polarization of the incoming electrons. We use spin interferometry to measure the divergence of the period of interlayer exchange coupling upon approaching a zone boundary. We propose that interferometric spin selection should be observable in spin polarized scanning tunneling spectroscopy. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372957
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  • 6
    Electronic Resource
    Electronic Resource
    Bifurcation in precessional switching (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2228-2230 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We explore the precessional motion of the magnetization vector in a model magnetic element. We find that the Landau–Lifshitz equation governing this motion allows trajectories of the magnetization vector to bifurcate. This yet unknown phenomenon is accompanied by a slowing down of the precessional motion and an abrupt shrinking of the size of the trajectory of the precessing magnetization. We discuss the implication of bifurcation for future devices using precessional switching and suggest how magnetic elements showing the classical phenomenon of bifurcation can be tuned to act as quantum bits. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1407299
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetic switching in ultrashort field pulses (abstract) : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 3966-3966 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The Ginzburg–Landau–Lifshitz (GLL) equation, which describes the time dependence of spin precesssion in an external magnetic field1 relates the minimal field required to reverse the magnetization at fixed pulse length to the anisotropy field of the sample.23 We have systematically varied this parameter between 1.3 and about 5.0 T in a series of perpendicularly magnetized Co/Pt multilayer films and studied the magnetization reversal in picosecond in plane field pulses. Such pulses of several Tesla field strength and ultrashort duration were obtained in the final focus test beam section of the Stanford Linear Accelerator Center. The resulting magnetization pattern, which is reminiscent of the field during exposure, is subsequently analyzed with Kerr microscopy2 (see Fig. 1). As a prominent feature, we observe a beam field related switching radius from up to down magnetization which we compare to the theoretically expected field within the GLL formalism.© 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365024
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic anisotropy oscillations (invited) : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 5054-5057 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic anisotropy in Co films epitaxially grown on Cu(001) is investigated by measuring magneto-optical Kerr hysteresis loops during film growth. As a function of Co thickness the magnetic anisotropy oscillates with a period of 1 monolayer. These oscillations are attributed to the periodic variations of the film morphology alternating between filled and incompletely filled atomic layers. Upon coverage of the Co films with Cu overlayers the anisotropy of the magnetic film is found to oscillate with increasing Cu layer thickness. We relate these oscillations to quantum interferences due to the confinement of electrons in ultrathin films. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364506
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  • 9
    Electronic Resource
    Electronic Resource
    Magnetic switching in cobalt films by adsorption of copper (1995)
    [s.l.] : Nature Publishing Group
    Nature 374 (1995), S. 788-790 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We use Co films grown epitaxially on a Cu(lOO) single crystal with a slight miscut of 1.6° in the [110] direction-this produces a controlled step structure. These steps turn out to play a central part in the magnetic switching. To detect changes in the magnetization, we use spin-polarized ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/374788a0
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  • 10
    Electronic Resource
    Electronic Resource
    Experimental confirmation of universality for a phase transition in two dimensions (1995)
    [s.l.] : Nature Publishing Group
    Nature 378 (1995), S. 597-600 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We grow epitaxial Fe films at room temperature on top of a non-magnetic single-crystal W(110) surface. Pressure in the vacuum chamber during growth does not exceed 2 x 1010 mbar. In the ferromagnetically ordered phase, the films have a uniaxial easy magnetization axis along the in-plane [110] ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/378597a0
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