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You searched on: Author: robert shull

Displaying records 11 to 20 of 80 records.
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11. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909429

12. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905909

13. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905482

14. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903140

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903901

16. Vertically Graded Anisotropy in Co/Pd Multilayers
Published: 3/8/2010
Authors: Brian J Kirby, Joseph E. Davies, Kai Liu, Shannon Watson, G. T. Zimanyi, Robert D Shull, Paul 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904132

17. Magnetic Properties of Zr_(9)Ni_(11)Intermetallic Compound
Published: 2/7/2010
Authors: Virgil Provenzano, Robert D Shull, Richard M. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853616

18. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902996

19. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854449

20. Probing the Growth and Aging of Colloidal Cobalt Nanoparticles
Published: 6/11/2009
Authors: Guangjun Cheng, Cindi L Dennis, Robert D Shull, Angela R Hight Walker
Abstract: We have combined transmission electron microscopy (TEM) and magnetic measurements to characterize the growth of colloidal cobalt (Co) nanoparticles during synthesis and their subsequent stability in air. During the growth, TEM measurements have shown ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842608



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