GB1421360A – Ferroelastic crystals
– Google Patents
GB1421360A – Ferroelastic crystals
– Google Patents
Ferroelastic crystals
Info
Publication number
GB1421360A
GB1421360A
GB5933473A
GB5933473A
GB1421360A
GB 1421360 A
GB1421360 A
GB 1421360A
GB 5933473 A
GB5933473 A
GB 5933473A
GB 5933473 A
GB5933473 A
GB 5933473A
GB 1421360 A
GB1421360 A
GB 1421360A
Authority
GB
United Kingdom
Prior art keywords
crystal
ferroelastic
walls
zig zag
parallel
Prior art date
1972-12-26
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5933473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1972-12-26
Filing date
1973-12-21
Publication date
1976-01-14
1973-12-21
Application filed by EI Du Pont de Nemours and Co
filed
Critical
EI Du Pont de Nemours and Co
1976-01-14
Publication of GB1421360A
publication
Critical
patent/GB1421360A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
G—PHYSICS
G02—OPTICS
G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
G02F1/0009—Materials therefor
G02F1/0018—Electro-optical materials
G02F1/0027—Ferro-electric materials
G—PHYSICS
G02—OPTICS
G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
G02F1/05—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect with ferro-electric properties
Abstract
1421360 Ferroelastic crystals E I DU PONT DE NEMOURS & CO 21 Dec 1973 [26 Dec 1972] 59334/73 Heading BIG [Also in Divisions Cl and H4] A ferroelastic crystal having a domain wall extending across the crystal in a zig zag configuration and partitioning the crystal into first and second ferroelastic domains having different strain states is made by applying a shear stress to such a crystal under conditions which inhibit planar domain wall formation. By ferroelastic is meant a crystal which has two or more spontaneous strain orientation states in the absence of mechanical stress but can be changed from one orientation state to another by mechanical stress. The crystal may also be a coupled ferroelectric/ferroelastic material exhibiting uniaxial electric polarisation. Specified materials are α-lead phosphate and materials of the formula, wherein R and R’ represent scandium, yttrium or a rare earth element of atomic number from 57 to 71, x is 0 to 1.0 and e is from 0 to 0.2 e.g. #’gadolinium molybdate. The crystal having the zig zag configuration is preferably obtained by clamping portions of the crystal adjacent opposite faces to prevent deformation of the crystal in the clamped regions and to provide an unclamped central region having boundaries parallel to a twinning plane and applying an increasing shear stress to the crystal until one or more domain walls having a zigzag configuration appear in the unclamped region. Suitable apparatus is shown in the figure wherein C-cut crystal 10 having faces 16, 16′, 16″ and 16″‘ cut parallel to the (110) planes is clamped 11, by an adhesive along one portion 18 of crystal face 17 and a movable clamp 12 is cemented along an opposition portion 18′ of the same crystal face 17 so that the edges 19 and 19’ of the clamps are parallel to (110) planes. Desired pressure is then applied to clamp 12 by screw 13, to form zig zag walls 14 and 15. Another method of forming the walls is illustrated in Figure 5 (not shown).
GB5933473A
1972-12-26
1973-12-21
Ferroelastic crystals
Expired
GB1421360A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00318502A
US3799648A
(en)
1972-12-26
1972-12-26
Ferroelastic crystals switched by motion of a domain wall having a zigzag configuration
Publications (1)
Publication Number
Publication Date
GB1421360A
true
GB1421360A
(en)
1976-01-14
Family
ID=23238446
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5933473A
Expired
GB1421360A
(en)
1972-12-26
1973-12-21
Ferroelastic crystals
Country Status (7)
Country
Link
US
(1)
US3799648A
(en)
JP
(1)
JPS5924120B2
(en)
CA
(1)
CA1017233A
(en)
DE
(1)
DE2364096A1
(en)
FR
(1)
FR2211417B3
(en)
GB
(1)
GB1421360A
(en)
NL
(1)
NL7317496A
(en)
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4109359A
(en)
*
1976-06-07
1978-08-29
The United States Of America As Represented By The Secretary Of The Navy
Method of making ferroelectric crystals having tailored domain patterns
JPS59102130U
(en)
*
1982-12-28
1984-07-10
株式会社高岳製作所
container dehumidifier
JPH048986Y2
(en)
*
1985-03-14
1992-03-06
JPH02194810A
(en)
*
1989-01-23
1990-08-01
Kankiyoo:Kk
Dry dehumidifier
DE69026766T2
(en)
*
1989-05-18
1996-11-28
Sony Corp
Method for controlling the ferroelectric domains of a nonlinear optical substrate
US5750272A
(en)
*
1995-02-10
1998-05-12
The Research Foundation Of State University Of New York
Active and adaptive damping devices for shock and noise suppression
JPH09146128A
(en)
*
1995-11-24
1997-06-06
Sony Corp
Electrooptic element
US6579635B2
(en)
2000-10-12
2003-06-17
International Business Machines Corporation
Smoothing and stabilization of domain walls in perpendicularly polarized magnetic films
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3596863A
(en)
*
1969-01-28
1971-08-03
Nasa
Fine adjustment mount
JPS5335459B1
(en)
*
1969-03-10
1978-09-27
US3732549A
(en)
*
1972-05-08
1973-05-08
Du Pont
Process and apparatus for control of domain walls in the ferroelastic-ferroelectric crystals
1972
1972-12-26
US
US00318502A
patent/US3799648A/en
not_active
Expired – Lifetime
1973
1973-12-19
FR
FR7345441A
patent/FR2211417B3/fr
not_active
Expired
1973-12-20
NL
NL7317496A
patent/NL7317496A/xx
unknown
1973-12-21
CA
CA188,914A
patent/CA1017233A/en
not_active
Expired
1973-12-21
GB
GB5933473A
patent/GB1421360A/en
not_active
Expired
1973-12-21
DE
DE2364096A
patent/DE2364096A1/en
active
Pending
1973-12-24
JP
JP48143663A
patent/JPS5924120B2/en
not_active
Expired
Also Published As
Publication number
Publication date
JPS4996297A
(en)
1974-09-12
JPS5924120B2
(en)
1984-06-07
US3799648A
(en)
1974-03-26
DE2364096A1
(en)
1974-11-14
CA1017233A
(en)
1977-09-13
FR2211417A1
(en)
1974-07-19
NL7317496A
(en)
1974-06-28
FR2211417B3
(en)
1976-10-15
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Legal Events
Date
Code
Title
Description
1976-10-06
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
