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23 Aug 2010

Volume 97, Issue 8, Articles (08xxxx)

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Appl. Phys. Lett. 97, 081901 (2010); http://dx.doi.org/10.1063/1.3457448 (3 pages)

Zhaofeng Li, Rongkuo Zhao, Thomas Koschny, Maria Kafesaki, Kamil Boratay Alici, Evrim Colak, Humeyra Caglayan, Ekmel Ozbay, and C. M. Soukoulis
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Exchange coupled composite bit patterned media

P. Krone, D. Makarov, T. Schrefl, and M. Albrecht

Appl. Phys. Lett. 97, 082501 (2010); http://dx.doi.org/10.1063/1.3481668 (3 pages) | Cited 9 times

Online Publication Date: 24 August 2010

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A micromagnetic study on the magnetization reversal in bit patterned media (BPM) with each bit consisting of an exchange coupled composite (ECC) layer stack is presented. The simulations reveal superior magnetic properties of the combined ECC/BPM scheme, in particular for graded media, using uncorrelated distributions of magnetic anisotropy values in order to lower the switching field while keeping a high thermal stability of the media. In this study, a route for narrowing the switching field distribution of the bit array is provided as well, which is vital for the applicability of the BPM concept in magnetic data storage.
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85.70.Li Other magnetic recording and storage devices (including tapes, disks, and drums)
75.78.Cd Micromagnetic simulations
75.60.Jk Magnetization reversal mechanisms
75.30.Gw Magnetic anisotropy

Growth of superconducting Sr2RuO4 thin films

Y. Krockenberger, M. Uchida, K. S. Takahashi, M. Nakamura, M. Kawasaki, and Y. Tokura

Appl. Phys. Lett. 97, 082502 (2010); http://dx.doi.org/10.1063/1.3481363 (3 pages) | Cited 3 times

Online Publication Date: 26 August 2010

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Sr2RuO4 is a superconductor with a low transition temperature (Tc ∼ 1 K), but has a unique character of p-wave symmetry of the order parameter, demanding epitaxial thin films for Josephson junction studies. We have grown c-axis oriented epitaxial films by a pulsed laser deposition technique on (001) surfaces of (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 substrates. Careful tuning of growth conditions yielded in a layer-by-layer growth of high crystallinity films. The films show a residual resistivity ratio (ρ300 K/ρ2 K) as large as 82 and a superconducting transition with a zero resistivity at 0.6 K.
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81.15.Fg Pulsed laser ablation deposition
68.55.at Other materials
74.70.Pq Ruthenates
74.25.fc Electric and thermal conductivity
74.78.-w Superconducting films and low-dimensional structures
74.62.Bf Effects of material synthesis, crystal structure, and chemical composition
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