TITLE

Relevance of length scales in exchange biased submicron dots

AUTHOR(S)
Li, Zhi-Pan; Morales, R.; Schuller, Ivan K.
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/6/2009, Vol. 94 Issue 14, p142503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Strong dot-size dependence of the positive exchange bias onset with the cooling field was found in Ni/FeF2 exchange biased nanostructures. With increasing cooling field, the sign of the exchange bias field changes from negative to coexistence of positive and negative, and eventually to positive. As the structure size decreases, the lower limit of cooling fields necessary for only positive exchange bias also decreases and is one order of magnitude smaller than that of unpatterned films. This behavior is attributed to comparable Ni dot size with the antiferromagnet “domain” size estimated to be about 500 nm.
ACCESSION #
37580368

 

Related Articles

  • Fe adatoms along Bi nanolines on H/Si(001). Orellana, W.; Miwa, R. H. // Applied Physics Letters;8/28/2006, Vol. 89 Issue 9, p093105 

    The stability and electronic and magnetic properties of Fe atoms adsorbed on the self-assembled Bi-line nanostructure on the H/Si(001) surface are addressed by spin-density functional calculations. Our results show that Fe adatoms are much more stable on sites closer to the Bi nanolines...

  • Unconventional exchange bias in CoCr2O4/Cr2O3 nanocomposites. Guo, S.; Liu, X. H.; Cui, W. B.; Liu, W.; Zhao, X. G.; Li, D.; Zhang, Z. D. // Journal of Applied Physics;Mar2009, Vol. 105 Issue 6, p064702 

    Unconventional exchange bias (EB) has been studied in CoCr2O4/Cr2O3 nanocomposites, in which the Curie temperature of the ferrimagnetic CoCr2O4 is much lower than the Néel temperature of the antiferromagnetic Cr2O3. A negative EB field of about 2.5 kOe at 5 K is achieved upon cooling in a...

  • Angular dependence of positive exchange biasing in GdFe/FeMn bilayers. Du, J.; Yang, D. Z.; Bai, X. J.; Wu, X. S.; Hu, A.; Zhou, S. M.; Sun, L. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08C103 

    For Gd45Fe55/Fe50Mn50 bilayers, both negative and positive exchange biasing have been observed for low and high magnetic cooling field HCF, respectively. These results can be attributed to a competition between antiferromagnetic coupling at GdFe/FeMn interface and the Zeeman energy of FeMn spins...

  • Magnetic properties of Fe chains on Cu2N/Cu(100): A density functional theory study. Nicklas, Jeremy W.; Wadehra, Amita; Wilkins, John W. // Journal of Applied Physics;Dec2011, Vol. 110 Issue 12, p123915 

    We present a density functional study of the magnetic properties of Fe adatoms on Cu2N/Cu(100) surface. The magnetic anisotropy energies of a single Fe atom are in excellent agreement with the available experiments. Our results for the spin densities and exchange coupling strengths for Fe dimer...

  • Depth-dependent magnetization reversal and spin structure of Fe/NiO exchange-coupled epitaxial bilayers. Luches, P.; Pasquini, L.; Benedetti, S.; Valeri, S.; Rüffer, R.; Boscherini, F. // Applied Physics Letters;8/20/2012, Vol. 101 Issue 8, p082412 

    We investigate the depth-dependent magnetization reversal and spin structure of Fe/NiO epitaxial bilayers before and after field cooling. Using nuclear resonant scattering of synchrotron radiation we selectively probe the spin structure of the interfacial layers in contact with NiO. We provide a...

  • MAGNETIC ELASTOMERS BASED ON NANOSTRUCTURAL RE-3d-METAL-BORON AND IRON POWDER FILLERS WITH IMPRUVED ATTRACTION FORCE TO FERROMAGNETIC BODIES. Kudrevatykh, Nikolai V.; Safronov, Alexander P.; Andreev, Sergey V.; Maslov, Anatoliy N.; Petrov, Anton V.; Volegov, Aleksey S.; Mayura, Kirill S.; Maslennikov, Valeriy G. // Journal of International Scientific Publications: Materials, Met;2012, Vol. 6 Issue 2, p98 

    In this work the magnetic and mechanical characteristics of magnetic elastomers named as hard and soft magnetic rubbers (HMR and SMR respectively) based on chloroprene, isoprene and butadiene- acrylonitrile rubber binders and nanostructural Rare-Earth-3d-Metal-Boron (MQP-B brand) and nanosized...

  • Single domain observation for synthetic antiferromagnetically coupled bits with low aspect ratios. Tezuka, N.; Koike, N.; Inomata, K.; Sugimoto, S. // Applied Physics Letters;1/27/2003, Vol. 82 Issue 4, p604 

    Arrays of the synthetic antiferromagnetic (SyAF) patterned bits were successfully fabricated with micron to submicron sizes. Magnetic domain structure was investigated using magnetic force microscopy (MFM) for the SyAF bits as well as monolayer bits. MFM image of Co[sub 90]Fe[sub 10](10...

  • Mechanism of magnetism in stacked nanographite: Theoretical study. Harigaya, Kikuo; Kawatsu, Naoki; Enoki, Toshiaki // AIP Conference Proceedings;2001, Vol. 590 Issue 1, p529 

    Antiferromagnetism in stacked nanographite is investigated with using the Hubbard-type model. The A-B stacking is favorable for the hexagonal nanographite with zigzag edges, in order that magnetism appears. Next, we find that the open shell electronic structures can be origins of the decreasing...

  • Exchange coupling between ferromagnetic fcc Ni81Fe19 and antiferromagnetic bcc CrMnPt films. Soeya, Susumu; Hoshiya, Hiroyuki; Fuyama, Moriaki; Tadokoro, Shigeru // Journal of Applied Physics;7/15/1996, Vol. 80 Issue 2, p1006 

    Deals with a study which examined exchange coupling between ferromagnetic fcc Ni[sub81]Fe[sub19] and antiferromagnetic bcc CrMnPt films. Experimental procedures; Results and discussion; Conclusion.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics