Development and Comparison of Two X-Ray Methods for Determining the Crystallinity of Cotton Cellulose
Two x-ray methods have been developed for determining the crystallinity of cellulose using a Geiger counter spectrometer. The two methods were applied to six native cotton varieties, to a cross-bred v...
Two x-ray methods have been developed for determining the crystallinity of cellulose using a Geiger counter spectrometer. The two methods were applied to six native cotton varieties, to a cross-bred v...
Electromotive Force in a Highly Ionized Plasma Moving Across a Magnetic Field
When a cloud of highly ionized gas flows across a magnetic field, an emf is produced in the gas which is proportional to the speed of flow. Oscillographic probe measurements have been carried out givi...
When a cloud of highly ionized gas flows across a magnetic field, an emf is produced in the gas which is proportional to the speed of flow. Oscillographic probe measurements have been carried out givi...
On the Dependence of the Switching Time of Barium Titanate Crystals on Their Thickness
J. Appl. Phys. 30, 1663 (1959); doi:10.1063/1.1735032
Issue Date: November 1959
You are not logged in to this journal. Log in
The dependence of switching rate on the crystal thickness has been measured by Merz and explained by him in terms of a surface layer which has a low dielectric constant, and is about 10−4 cm thick. While not explicitly stated in Merz' original arguments, the layer must have a reversible polarization. If a layer without a reversible polarization is assumed, instead, and the discontinuity of the normal component of polarization at the interface between the layer and the bulk is taken into account, then a much thinner layer (~1 atomic thickness) will explain the thickness dependence. This layer can be taken to be very lossy, so that it has a relaxation time (for the disappearance of electric fields) short compared to the switching time, and yet the layer will still be completely effective in slowing down domain wall motion.
©1959 The American Institute of Physics
| History: | Received March 30, 1959 |
| Permalink: |
http://link.aip.org/link/?JAPIAU/30/1663/1 |
| BUY THIS ARTICLE | (US$24) |
|
|
Connotea
CiteULike
del.icio.us
BibSonomy
REFERENCES (15)
For access to fully linked references, you need to log in.
For access to fully linked references, you need to Log in.
- W. J. Merz, J. Appl. Phys. 27, 938 (1956).
- I. Ames (private communication).
- Landauer, Young, and Drougard, J. Appl. Phys. 27, 752 (1956).
- Drougard, Funk, and Young, J. Appl. Phys. 25, 1166 (1954).
- D. P. Cameron, IBM J. Research Develop. 1, 2 (1957).
- A. G. Chynoweth, Phys. Rev. 102, 705 (1956).
- M. E. Drougard and H. Schlosser (to be published).
- R. Landauer, J. Appl. Phys. 28, 227 (1957).
- R. C. Miller and A. Savage, Phys. Rev. 112, 755 (1958).
- F. C. Frank (private communication).
- We are indebted to P. Bakshi for pointing out that the integrals involved could be expressed in closed form.
- Jahnke and Emde, Tables of Functions (Dover Publications, Inc., New York, 1945), p. 1.
- Again assuming that the crystal is thick enough so that the field between the interface and the electrode is essentially unaffected by the existence of the far electrode.
- R. C. Miller (private communication).
- C. F. Pulvari and W. Kuebler, J. Appl. Phys. 29, 1742 (1958).
