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You searched on: Author: robert shull

Displaying records 11 to 20 of 81 records.
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11. Influence of Pt spacer thickness on the domain nucleation in ultrathin Co/Pt/Co trilayers
Published: 5/1/2013
Authors: Robert D Shull, Yury Y. Iunin, Y. P. Kabanov, Valerian Ivanovich Nikitenko, O. V. Skryabina, C. L. Chien
Abstract: The effect of varying the interlayer coupling between two 0.6 nm thick Co layers with perpendicular anisotropy on their magnetic ground state and the domain nucleation processes during a field reversal was studied. A surprising transition from out-of ...

12. Ferri- to ferro-magnetic transition in the martensitic phase of a Heusler alloy
Published: 9/15/2012
Authors: Robert D Shull, Lawrence Herman Bennett, Virgil Provenzano, Y. NMN Jin, Igor Levin, E. Della Torre
Abstract: During the past decade the magnetic properties of Heusler alloys have been extensively studied, motivated in part by the observation of large magnetocaloric effect (MCE) peaks displayed by these alloys near room temperature. We present new data and ...

13. Controlling High Coercivities of Ferromagnetic Nanowires Encapsulated in Carbon Nanotubes
Published: 6/15/2010
Authors: Robert D Shull, Cindi L Dennis, A. Morelos-Gomez, Florentino NMN Lopez-Urias, Emilio NMN Munoz-Sandoval, H. Terrones, M. Terrones
Abstract: Cylindrical ferromagnetic nanowires encapsulated inside multiwalled carbon nanotubes (MWNTs) are synthesized by pyrolizing either ferrocene powder or ferrocene-toluene mixtures. By changing the way the precursor is thermolyzed, we have been able to c ...

14. In-Plane Field Effects on the Dynamics of Domain Walls in Ultathin Co Films with Perpendicular Anisotropy
Published: 5/19/2010
Authors: Y. P. Kabanov, Y. L. Iunin, Valerian Ivanovich Nikitenko, Alexander J. Shapiro, Robert D Shull, L. Y. Zhu, C. L. Chien
Abstract: We studied how the application of an in-plane field affects the asymmetries of the domain nucleation activity and domain wall velocity revealed previously in ultrathin Co films with perpendicular anisotropy. It is established that the asymmetries su ...

15. Clifford Glenwood Shull
Published: 3/31/2010
Author: Robert D Shull
Abstract: In 1975 Clifford Glenwood Shull was elected to membership in the National Academy of Science. He had earlier, 1956, been admitted to the American Academy of Arts and Sciences, and would in 1994 be awarded the Nobel Prize in Physics. These and other h ...

16. Direct Measurement of the Magnetocaloric Effect in Gd_{5}Si_{2}Ge_{1.9}Ga_{0.1}
Published: 3/19/2010
Authors: E. NMN Palacios, G. F. Wang, R. Burriel, Virgil Provenzano, Robert D Shull
Abstract: Doping with some metals (Fe, Cu, Ga, Mn, Al) reduces or removes the strong thermal hysteresis in the giant magnetocaloric alloys Gd_{5}Si_{x}Ge_{1-x}_{4}. We present heat capacity and direct measurements of the isothermal entropy change, ¢ST , and ad ...

17. Vertically Graded Anisotropy in Co/Pd Multilayers
Published: 3/8/2010
Authors: Brian J Kirby, Joseph E. Davies, Kai Liu, Shannon M Watson, G. T. Zimanyi, Robert D Shull, Paul A Kienzle, Julie A. Borchers
Abstract: It has been theoretically predicted that depth-grading the magnetic anisotropy in perpendicular magnetic media should reduce the field required to write data, without affecting the thermal stability. To study this prediction, we have produced a serie ...

18. Magnetic Properties of Zr_(9)Ni_(11)Intermetallic Compound
Published: 2/7/2010
Authors: Virgil Provenzano, Robert D Shull, Richard Milton Waterstrat, Lawrence Herman Bennett, Edward Della Torre, H. Seyoum
Abstract: We report on a very interesting magnetic behavior in the intermetallic compound Zr_(9)Ni_(11), namely, (i) spin-glass behavior and (ii) fluctuations in magnetization versus temperature curves.  The magnetic properties are consistent with structu ...

19. Scaling analysis of the magnetocaloric effect in Gd5Si2Ge1.9X0.1 (X= Al, Cu, Ga, Mn, Fe, Co)
Published: 9/4/2009
Authors: V. Franco, A. Conde, Virgil Provenzano, Robert D Shull
Abstract: The field dependence of the magnetic entropy change has been studied for a series of doped Gd5Si2Ge2 alloys, which possess a magnetic phase transition that is either entirely second order or a combination of primarily second order mixed to a very min ...

20. Frustrated magnetization reversal in Co/Pt multilayer films
Published: 7/13/2009
Authors: Joseph E. Davies, O Hellwig, Eric E. Fullerton, M. Winklhofer, Robert D Shull, Kai Liu
Abstract: The magnetization reversal behavior in Co/Pt multilayers with perpendicular anisotropy are studied by the first order reversal curve (FORC) method. In addition to the previously observed three stage reversal process where domains first nucleate, the ...

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