Increased transition temperature in in situ coevaporated YBa2Cu3O7−
thin films by low temperature post-annealing
In situ coevaporated YBa2Cu3O7− thin films have a slightly depressed transition temperature Tc, though they have excellent radio-frequency surface resistance characteristics. These films consist...
thin films by low temperature post-annealingIn situ coevaporated YBa2Cu3O7− thin films have a slightly depressed transition temperature Tc, though they have excellent radio-frequency surface resistance characteristics. These films consist...
Single-walled carbon nanotubes growing radially from YC2 particles
In the primary soot produced by arc discharge using an yttrium carbide loaded anode, bundles of single-walled carbon nanotubes (SWT) are observed, protruding radially from YC2 particles coated with gr...
In the primary soot produced by arc discharge using an yttrium carbide loaded anode, bundles of single-walled carbon nanotubes (SWT) are observed, protruding radially from YC2 particles coated with gr...
The electrostatic polarization of ferroelectric liquid crystals: A new interpretation of the triangle-wave technique
Appl. Phys. Lett. 65, 1590 (1994); doi:10.1063/1.112923
Issue Date: 19 September 1994
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We show that the electrostatic polarization measured in ferroelectric liquid crystals using the standard triangle-wave technique is not the total polarization of the sample, but rather a specific nonlinear component of the total polarization. We present a Landau theory to calculate this nonlinear component explicitly. In the high-temperature limit, above the smectic-A–smectic-C* phase transition, the theory predicts that the observed polarization scales as E3/(T−TAC)4, where T is the temperature and E the applied electric field. In the low-temperature limit, the observed polarization approaches the total polarization. These theoretical predictions are consistent with experimental measurements.
Applied Physics Letters is copyrighted by The American Institute of Physics.
| History: | Received 6 May 1994; accepted 11 July 1994 |
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http://link.aip.org/link/?APPLAB/65/1590/1 |
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BibSonomy
KEYWORDS and PACS
LIQUID CRYSTALS,
FERROELECTRICITY,
POLARIZATION,
LANDAU THEORY,
TEMPERATURE DEPENDENCE,
ELECTRIC FIELD EFFECTS,
PHASE TRANSFORMATIONS,
DATA ANALYSIS
- 61.30.-v
Structure of solids and liquids; crystallography Liquid crystals - 77.80.-e
Dielectrics, piezoelectrics, and ferroelectrics and their properties Ferroelectricity and antiferroelectricity - 77.22.Ej
Dielectrics, piezoelectrics, and ferroelectrics and their properties Dielectric properties of solids and liquids Polarization and depolarization - 77.84.Nh
Dielectrics, piezoelectrics, and ferroelectrics and their properties Dielectric, piezoelectric, and ferroelectric materials Liquids, emulsions, and suspensions; liquid crystals - YEAR: 1994
RELATED DATABASES
PUBLICATION DATA
0003-6951 (print)
1077-3118 (online)
AIP
REFERENCES (6)
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