Ferroelectric Properties and Domain Clamping of (Bi0.5Na0.5)TiO3 Single Crystals Grown under High-Oxygen-Pressure Atmosphere

2013 ◽  
Vol 566 ◽  
pp. 29-33
Author(s):  
Yuuki Kitanaka ◽  
Hiroaki Onozuka ◽  
Yuji Noguchi ◽  
Masaru Miyayama
Keyword(s):  
Single Crystals ◽  
Oxygen Pressure ◽  
High Performance ◽  
Ferroelectric Properties ◽  
Piezoresponse Force Microscopy ◽  
High Oxygen ◽  
Force Microscopy ◽  
High Oxygen Pressure ◽  
Growth Method ◽  
Measured Polarization

Top-seeded solution growth method under high-oxygen-pressure atmosphere has been developed for obtaining high-performance and large-sized single crystals of ferroelectric (Bi0.5Na0.5)TiO3 (BNT). Crystals grown at 1000 °C at a Po2 of 0.9 MPa exhibited a well-saturated hysteresis with a remanent polarization of 34 μC/cm2 and a coercive field of 22 kV/cm along <100>cubic. The spontaneous polarization of BNT along <111>cubic is estimated to be 59 μC/cm2 from the measured polarization properties along <100>cubic of the crystals obtained. Domain observations using piezoresponse force microscopy revealed that the degraded performance of BNT crystals grown at a low Po2 is attributed to unswitched 71° domains remaining even after applying a high electric field to the crystals .

Ferroelectric and Piezoelectric Properties of Bi4Ti3O12 Single Crystals Grown by Top-Seeded Solution Growth Method at High Oxygen Pressure

2011 ◽  
Vol 485 ◽  
pp. 73-76
Author(s):  
Yuuki Kitanaka ◽  
Yuji Noguchi ◽  
Masaru Miyayama
Keyword(s):  
Single Crystals ◽  
Oxygen Pressure ◽  
High Performance ◽  
Piezoresponse Force Microscopy ◽  
High Oxygen ◽  
Solution Growth ◽  
Force Microscopy ◽  
High Oxygen Pressure ◽  
Growth Method ◽  
Top Seeded Solution Growth

High-performance single crystals of ferroelectric Bi4Ti3O12 (BiT) have been successfully obtained via the top-seeded solution growth under high oxygen pressure (Po2) atmosphere. Crystals grown at 960°C at a Po2 of 0.9 MPa exhibited a well-saturated hysteresis loop with a remanent polarization of 48 mC/cm2 and a coercive field of 29 kV/cm. The results of piezoresponse force microscopy indicate that polarization switching is accomplished throughout the BiT crystals obtained. Electric-field-induced strain measurements along the a axis yield a piezoelectric constant d11* of 37 pm/V for BiT.

scholarly journals Electric-field-induced giant strain in Bi0.5Na0.5TiO3-based single crystals: Influence of high-oxygen-pressure annealing

2009 ◽  
Vol 117 (1361) ◽  
pp. 32-36 ◽  
Author(s):  
Yuji NOGUCHI ◽  
Shunsuke TERANISHI ◽  
Muneyasu SUZUKI ◽  
Masaru MIYAYAMA
Keyword(s):  
Electric Field ◽  
Single Crystals ◽  
Oxygen Pressure ◽  
High Oxygen ◽  
High Oxygen Pressure

On the growth of overdoped Bi-2212 single crystals under high oxygen pressure

2001 ◽  
Vol 355 (1-2) ◽  
pp. 140-146 ◽  
Author(s):  
A Maljuk ◽  
B Liang ◽  
C.T Lin ◽  
G.A Emelchenko
Keyword(s):  
Single Crystals ◽  
Oxygen Pressure ◽  
High Oxygen ◽  
High Oxygen Pressure

Ferroelectric Polarization Properties in High-Performance Bismuth Sodium Titanate Single Crystals

2011 ◽  
Vol 485 ◽  
pp. 7-10 ◽  
Author(s):  
Muneyasu Suzuki ◽  
Yuuki Kitanaka ◽  
Yuji Noguchi ◽  
Jun Akedo ◽  
Masaru Miyayama
Keyword(s):  
Single Crystals ◽  
Oxygen Pressure ◽  
Spontaneous Polarization ◽  
High Performance ◽  
Sodium Titanate ◽  
Bismuth Sodium Titanate ◽  
Flux Method ◽  
Saturated Polarization ◽  
High Oxygen Pressure ◽  
Bismuth Sodium

(Bi0.5Na0.5)TiO3 (BNT) single crystals were grown by flux method at a high oxygen pressure (Po2) of 1 MPa, and their polarization properties were investigated. BNT single crystals exhibited a saturated polarization hysteresis with a remanent polarizations (Pr) of 31 μC/cm2 along [100]c, 44 μC/cm2 along [110]c and 54 μC/cm2 along [111]c. These results show that spontaneous polarization of BNT is approximately 55 mC/cm2 or larger.

The growth of TiO2 (rutile) single crystals using the FZ method under high oxygen pressure

2002 ◽  
Vol 237-239 ◽  
pp. 730-734 ◽  
Author(s):  
Jong Kwan Park ◽  
Kwang Bo Shim ◽  
Keun Ho Auh ◽  
Isao Tanaka
Keyword(s):  
Single Crystals ◽  
Oxygen Pressure ◽  
High Oxygen ◽  
High Oxygen Pressure ◽  
Tio2 Rutile

Nanoscale Ferroelectric Properties of PZN-PT Single Crystals Studied by Scanning Force Microscopy

2003 ◽  
Vol 785 ◽  
Author(s):  
I. K. Bdikin ◽  
V. V. Shvartsman ◽  
A. L. Kholkin
Keyword(s):  
Single Crystals ◽  
Ferroelectric Properties ◽  
Polarization State ◽  
Domain Wall Motion ◽  
Piezoresponse Force Microscopy ◽  
Scanning Force Microscopy ◽  
Switching Behavior ◽  
Zero Field ◽  
Irregular Domain ◽  
Force Microscopy

ABSTRACTHigh-resolution domain studies were performed in Pb(Zn1/3Nb2/3)O3-4.5%PbTiO3 (PZN-PT) single crystals via piezoresponse force microscopy (PFM). Irregular domain patterns with the typical sizes of 20–100 nm were observed on the (001)-oriented surfaces of unpoled samples. On the contrary, (111) crystal cuts exhibited normal micron-sized regular domains with the domain boundaries directed along allowed crystallographic planes. The existence of nanodomains in (100)-oriented crystals was tentatively attributed to the relaxor nature of PZN-PT where small polar clusters were predicted to exist upon zero-field cooling. These nanodomains were considered as the nuclei of the opposite polarization state that ease the switching process for this particular crystal cut. Local piezoelectric hysteresis was also performed by PFM on the nanometer scale. Similar switching behavior of (111)- and (100)-oriented PZN-PT crystals suggests that their superior piezoelectric properties can be related to the domain wall motion rather than to the perovskite lattice itself.

scholarly journals Optical Properties of Rutile Single Crystals Grown Under Pressure by Tilting-Mirror-Type Floating Zone Method

2015 ◽  
Vol 7 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
M. A. R. Sarker
Keyword(s):  
Optical Properties ◽  
Grain Boundaries ◽  
Single Crystals ◽  
Oxygen Pressure ◽  
Applied Pressure ◽  
High Oxygen ◽  
Blue Color ◽  
Floating Zone ◽  
Zone Method ◽  
High Oxygen Pressure

Rutile single crystals with high quality and high transparency were grown successfully by tilting-mirror-type floating zone (TMFZ) technique. The grown crystals were characterized by polarized optical microscopy, X-ray diffractometer, UV-visible spectrophotometer and etch pits density measurement. The effect of applied pressure during growth on the optical properties and defect density of the rutile crystals were investigated. It was found that the rutile crystals grown under the high oxygen pressure are bright and transparent due to the lower concentration of defects, but rutile crystals grown at ambient or lower oxygen pressure exhibit deep blue color due to presence of defects such as dislocations and grain boundaries. The crystals grown under high oxygen pressure contains no low-angle grain boundaries, indicating that it can be used for high efficiency optical devices.

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