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Author: sudook kim
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Displaying records 1 to 10 of 38 records.
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1. Accuracy of Resonant Ultrasound Spectroscopy: An Experimental Study
Published: 10/1/1997
Authors: M C Renken, Sudook A Kim, K W Hollman, C M Fortunko
Abstract: We use Resonant Ultrasound Spectroscopy (RUS) to routinely determine elasticstifftness coefficents. To establish the uncertaintly of RUS, we determined the longitudinal wave velocity in a cylinder (25.6 mm x 25.4 mm diam.) of fused silica using thre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851189

2. Acoustic Damping in Langatate as a Function of Temperature, Frequency, and Mechanical Contact
Published: 10/1/2002
Authors: Ward L Johnson, Sudook A Kim, Damian Sky Lauria, R C Smyth
Abstract: Resonant acoustic damping in plano-convex (trapped-mode) langatate (La^d3^Ga^d5.5^Ta0^d0.5^0^d14^) discs was measured at frequencies from 2 MHz to 18 MHz and temperatures from 130 K to 450 K. A broad anelastic relaxation peak was observed in the temp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851324

3. Acoustic Study of Texture in Polycrystalline Brass
Published: 5/1/1999
Authors: K Foster, S L Fairburn, R G Leisure, Sudook A Kim, Davor Balzar, G A Alers, H M Ledbetter
Abstract: Resonant ultrasonic spectroscopy was used to measure the orthorhombic elastic constants of rolled, polycrystalline plates of Cu, Cu - 5% Zn, and Cu - 15% Zn. The experimental results were in good agreement with theory for the Cu and the Cu-15% Zn ma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851277

4. Brillouin light scattering from pumped uniform-precession and low-k magnons in Ni81Fe19
Published: 3/4/2005
Authors: Ward L Johnson, Sudook A Kim, Stephen E Russek, Pavel Kabos
Abstract: A method is presented for performing Brillouin-light-scattering measurements on uniform-precession and low-wave-number (Iow-k) magnons excited by a microwave magnetic field in opaque magnetic specimens. The optical configuration is similar to that e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50065

5. Bulk-Moduli Systematics in Oxides Including Superconductors
Published: 1/5/2001
Authors: H M Ledbetter, Sudook A Kim
Abstract: For oxides, including superconductors, we consider the systematics of the bulk-modulus/atomic-volume (B/V^da^) relationship. For nonsuperconducting oxides, the B-V^da^ diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851170

6. Bulk-Moduli Systematics in Oxides, Including Superconductors
Published: 1/1/2001
Authors: H M Ledbetter, Sudook A Kim
Abstract: For oxides, including superconductors, we consider the systematics fo the bulk-modulus/atomic-volume (B/V^d{alpha}^) relationship. For nonsuperconducting oxides, the B-V^d{alpha} diagram shows that most oxides fall in three sets: (1) rocksalt crysta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851365

7. Characterization of Magnetic Properties at Edges by Edge Mode Dynamics
Published: 4/21/2006
Authors: Brian B. Maranville, Robert D McMichael, Sudook A Kim, Ward L Johnson, C A Ross, J Cheng
Abstract: We have used trapped spinwave or edge modes of magnetic precession to probe the magnetic environment near magnetic film edges magnetized perpendicular to the edge. Micromagnetic models of dynamics in stripes reveal that the edge mode frequency-fie ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853548

8. Clementite's Elastic Constants
Published: Date unknown
Authors: Sudook A Kim, H M Ledbetter
Abstract: By extrapolation, we estimated cementite's elastic constants. Altogether, we studied seven Fe-C binary alloys varying from 0 to 17.3 atomic percent carbon. Thus, we measured hypoeutectoid, near eutectoid, and hypereutectoid alloys. For cementite, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851236

9. Effects of shape distortions and imperfections on mode frequencies and collective linewidths in nanomagnets
Published: 3/28/2011
Authors: Hans Toya Nembach, Justin M Shaw, Thomas J Silva, Ward L Johnson, Sudook A Kim, Robert D McMichael, Pavel Kabos
Abstract: We used Brillouin light scattering to show that shape distortions in Ni80Fe20 nanoelements can have a dramatic effect on the measured linewidth of certain modes. By intentionally introducing an amount of ,egg-likeŠ shape distortion to an ideal ellip ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907044

10. Elastic Coefficients of Monocrystal Gelena (Pbs)
Published: Date unknown
Authors: Sudook A Kim, H M Ledbetter
Abstract: Using acoustic-resonance spectroscopy, we measured the three independent Voigt C^dkj^ (C^d11^, C^d12^, C^d44^) of cubic-symmetry galena (lead sulphide). Our results clarify the discrepancies of previous reports. We report also the internal friction ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851219



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