Frustration Driven Stripe Domain Formation in Co/Pt Multilayer Films (2009)
Davies, J. E., Hellwig, O., Fullerton, E. E., Winklhofer, M., Shull, R. D., Liu, Kai
We report microscopic mechanisms for an unusual magnetization reversal behavior in Co/Pt multilayers where some of the first-order reversal curves protrude outside of the major loop. Transmission...
Prinsloo, A.R.E., Derrett, H.A., Hellwig, O., Fullerton, E.E., Alberts, H.L., Van Den Berg, Nic
Dimensionality effects on epitaxial and polycrystalline Cr1-xRux alloy thin films and in Cr/Cr–Ru heterostructures are reported. X-ray analysis on Cr0.9965Ru0.0035 epitaxial films indicates an...
Magnetic remanent states in antiferromagnetically coupled multilayers (2008)
Kiselev, N. S., Roessler, U. K., Bogdanov, A. N., Hellwig, O.
In antiferromagnetically coupled multilayers with perpendicular anisotropy unusual multidomain textures can be stabilized due to a close competition between long-range demagnetization fields and...
Kiselev, N. S., Roessler, U. K., Bogdanov, A. N., Hellwig, O.
A rich variety of specific multidomain textures recently observed in antiferromagnetically coupled multilayers with perpendicular anisotropy include regular (equilibrium) multidomain states as well...
Oxidation of epitaxial Y(0 0 0 1) films (2008)
M. Ay, O. Hellwig, H.W. Becker, B. Hjörvarsson, H. Zabel
Journal article
Evidence for a dynamic phase transition in [Co/Pt]_3 magnetic multilayers (2007)
Robb, D. T., Xu, Y. H., Hellwig, O., McCord, J., Berger, A., Novotny, M. A., ...
A dynamic phase transition (DPT) with respect to the period P of an applied alternating magnetic field has been observed previously in numerical simulations of magnetic systems. However, experimental...
Disorder-induced magnetic memory: Experiments and theories (2006)
Pierce, M. S., Buechler, C. R., Sorensen, L. B., Kevan, S. D., Jagla, E. A., Deutsch, J. M., ...
Beautiful theories of magnetic hysteresis based on random microscopic disorder have been developed over the past ten years. Our goal was to directly compare these theories with precise experiments....
Davies, J E, Hellwig, O, Fullerton, E E, Jiang, J S, Bader, S D, Zimanyi, G T, ...
Magnetization reversal in exchange-spring magnet films has been investigated by a first-order reversal curve (FORC) technique and vector magnetometry. In Fe/epitaxial-SmCo films, the reversal...
Davies, J E, Hellwig, O, Fullerton, E E, Denbeaux, G, Kortright, J B, Liu, Kai
We investigate the magnetization reversal in [Co(4 Angstrom)/Pt(7 A)](50) multilayers with perpendicular magnetic anisotropy both macroscopically by the first-order reversal curve (FORC) technique...
Disorder-induced microscopic magnetic memory (2004)
Pierce, M. S., Buechler, C. R., Sorensen, L. B., Turner, J. J., Kevan, S. D., Jagla, E. A., ...
Using coherent x-ray speckle metrology, we have measured the influence of disorder on major loop return point memory (RPM) and complementary point memory (CPM) for a series of perpendicular...
X-ray study of aligned magnetic stripe domains in perpendicular multilayers (2003)
Hellwig, O., Denbeaux, G.P., Kortright, J.B., Fullerton, Eric E.
We have investigated the stripe domain structure and the magnetic reversal of perpendicular Co/Pt based multilayers at room temperature using magnetometry, magnetic imaging and magnetic x-ray...
Magnetism in heterogeneous thin film systems: Resonant x-ray scattering studies (2002)
Kortright, J.B., Jiang, J.S., Bader, S.D., Hellwig, O., Marguiles, D.T., Fullerton, E.E.
Magnetic and chemical heterogeneity are common in a broad range of magnetic thin film systems. Emerging resonant soft x-ray scattering techniques are well suited to resolve such heterogeneity at...