W
Ward L. Johnson
Researcher at National Institute of Standards and Technology
Publications - 65
Citations - 873
Ward L. Johnson is an academic researcher from National Institute of Standards and Technology. The author has contributed to research in topics: Light scattering & Ceramic capacitor. The author has an hindex of 15, co-authored 62 publications receiving 769 citations.
Papers
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Journal ArticleDOI
Elastic constants and internal friction of martensitic steel, ferritic-pearlitic steel, and α-iron
Sudook Kim,Ward L. Johnson +1 more
TL;DR: In this article, the elastic constants and internal friction of induction hardened and unhardened SAE 1050 plain-carbon steel at ambient temperatures were determined by resonant ultrasonic spectroscopy.
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Characterization of Magnetic Properties at Edges by Edge Mode Dynamics
Brian B. Maranville,Robert D. McMichael,Sudook Kim,Ward L. Johnson,Caroline A. Ross,Joy Cheng +5 more
TL;DR: In this paper, the edge-mode frequency goes to zero at the edge saturation field and becomes much less distinct for applied fields misaligned from the edge normal by as little as 1°.
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Effects of shape distortions and imperfections on mode frequencies and collective linewidths in nanomagnets
Hans T. Nembach,Justin M. Shaw,Thomas J. Silva,Ward L. Johnson,Sudook Kim,Robert D. McMichael,Pavel Kabos +6 more
TL;DR: In this paper, the intentional introduction of quantifiable asymmetric egg-like shape distortion to an ideal elliptical structure lifted the degeneracy of end modes with concentrated amplitude at the nanomagnet edges.
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Acoustic modes and elastic properties of polymeric nanostructures
R. D. Hartschuh,Alexander Kisliuk,V. N. Novikov,Alexei P. Sokolov,Paul R. Heyliger,C.M. Flannery,Ward L. Johnson,Christopher L. Soles,Wen-Li Wu +8 more
TL;DR: In this paper, the phonon spectra of polymeric linear nanostructures have been characterized using Brillouin light scattering and it was shown that there is no significant deviation from bulk mechanical properties and no mechanical anisotropy in structures as small as 88nm.
Journal Article
Acoustic modes and elastic properties of polymeric nanostructures
R. D. Hartschuh,Alexander Kisliuk,Alexei P. Sokolov,Vladimir Novikov,Paul R. Heyliger,C.M. Flannery,Ward L. Johnson,Christopher L. Soles,Wen-Li Wu +8 more
TL;DR: In this article, the phonon spectra of polymeric linear nanostructures have been characterized using Brillouin light scattering and it was shown that there is no significant deviation from bulk mechanical properties and no mechanical anisotropy in structures as small as 88nm.