APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

16 Nov 2009

Volume 95, Issue 20, Articles (20xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 95, 204101 (2009); http://dx.doi.org/10.1063/1.3238316 (3 pages)

Gengxin Zhang, Brandon Weeks, Richard Gee, and Amitesh Maiti
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Sol-gel derived ferroelectric nanoparticles investigated by piezoresponse force microscopy

F. Johann, T. Jungk, S. Lisinski, Á. Hoffmann, L. Ratke, and E. Soergel

Appl. Phys. Lett. 95, 202901 (2009); http://dx.doi.org/10.1063/1.3264052 (3 pages) | Cited 7 times

Online Publication Date: 16 November 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Piezoresponse force microscopy (PFM) was used to investigate the ferroelectric properties of sol-gel derived LiNbO3 nanoparticles. To determine the degree of ferroelectricity we took large-area images and performed statistical image-analysis. The ferroelectric behavior of single nanoparticles was verified by poling experiments using the PFM tip. Finally we carried out simultaneous measurements of the in-plane and the out-of-plane piezoresponse of the nanoparticles, followed by measurements of the same area after rotation of the sample by 90° and 180°. Such measurements basically allow to determine the direction of polarization of every single particle.
Show PACS
81.16.-c Methods of micro- and nanofabrication and processing
81.07.-b Nanoscale materials and structures: fabrication and characterization
77.80.Dj Domain structure; hysteresis
77.22.Ej Polarization and depolarization
81.10.Dn Growth from solutions
81.10.Fq Growth from melts; zone melting and refining
81.15.Lm Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)
77.84.-s Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials

Electro-optic laser beam shaping by patterned ferroelectric domains

Mahesh Krishnamurthi, Peng Li, Aseem Singh, J. G. Thomas, T. M. Lehecka, Z. Liu, and V. Gopalan

Appl. Phys. Lett. 95, 202902 (2009); http://dx.doi.org/10.1063/1.3262349 (3 pages) | Cited 1 time

Online Publication Date: 17 November 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate laser beam shaping by utilizing the linear electro-optic effect in patterned ferroelectric domains in lithium tantalate. The phase function essential for the conversion of a 633 nm wavelength laser light from a Gaussian to a flat-top intensity profile was computed using the Gerchberg–Saxton algorithm. The corresponding ferroelectric domain pattern required to induce the equivalent phase function was fabricated on a lithium tantalate crystal, and the performance compared with design specifications.
Show PACS
42.60.Fc Modulation, tuning, and mode locking
77.80.Dj Domain structure; hysteresis
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation

Visualization of highly graded oxygen vacancy profiles in lead-zirconate-titanate by spectrally resolved cathodoluminescence spectroscopy

Atsuo Matsutani, Zhenhua (Jerry) Luo, Soodkhet Pojprapai, Mark Hoffman, and Giuseppe Pezzotti

Appl. Phys. Lett. 95, 202903 (2009); http://dx.doi.org/10.1063/1.3245317 (3 pages)

Online Publication Date: 18 November 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The ultraviolet and visible cathodoluminescence (CL) emitted at room temperature from bulk hard lead-zirconate-titanate polycrystalline perovskite has been systematically collected before and after an annealing cycle conducted in a reducing atmosphere. Spectroscopic assessments have been made of the in-depth stoichiometric profile developed upon annealing from the sample surface toward the subsurface. Trapping of electronic charge and local atomic scale distortions in the perovskite oxygen octahedron influences the variation observed in visible CL emission, while lattice distortions upon annealing directly arise from the formation of oxygen vacancies.
Show PACS
78.60.Hk Cathodoluminescence, ionoluminescence
78.40.Ha Other nonmetallic inorganics
61.72.Cc Kinetics of defect formation and annealing
61.72.jd Vacancies
72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping
61.66.Bi Elemental solids
61.66.Dk Alloys

Surface functionalized Ba0.6Sr0.4TiO3 /poly(vinylidene fluoride) nanocomposites with significantly enhanced dielectric properties

Kecheng Li, Hong Wang, Feng Xiang, Weihong Liu, and Haibo Yang

Appl. Phys. Lett. 95, 202904 (2009); http://dx.doi.org/10.1063/1.3257371 (3 pages) | Cited 5 times

Online Publication Date: 20 November 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A nanocomposite was prepared by embedding Ba0.6Sr0.4TiO3 (BST)/silver core/shell nanoparticles (BST@Ag) into polyvinylidene-fluoride (PVDF). Through functionalizing the surface of BST nanoparticles by silver coating, the relative permittivity of composites was significantly increased to 153 at 100 Hz which is 73% higher than that of the composite making of untreated BST nanoparticals. The loss tangent was still low (less than 0.2) when the filler content of BST@Ag was 0.55. Increasing the conductivity of the interlayer between BST and PVDF by silver enhances the space charge polarization and forms a nanocapacitance network through the interparticle junctions connecting the electrodes of sample.
Show PACS
81.16.-c Methods of micro- and nanofabrication and processing
61.46.Df Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)
77.22.Gm Dielectric loss and relaxation
77.22.Ch Permittivity (dielectric function)
81.05.Qk Reinforced polymers and polymer-based composites
77.22.Ej Polarization and depolarization
77.22.Jp Dielectric breakdown and space-charge effects

Synergistic information encoding by combinatorial pulse operation of ferroelectrics

Dan Ricinschi, Damian Nicastro, Takeshi Kanashima, and Masanori Okuyama

Appl. Phys. Lett. 95, 202905 (2009); http://dx.doi.org/10.1063/1.3266871 (3 pages) | Cited 3 times

Online Publication Date: 20 November 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We explore beyond binary memory capability of ferroelectrics, aiming to render them able to encode multiple bit information, based on operation in a regime spanning several polarization reversal mechanisms. Accessing a Pb(Zr,Ti)O3 ceramic capacitor with combinatorial sequences of pulses whose amplitude, width, and polarity are all allowed to vary during polarization reversal, eight partially switched multiple-level memory states are reproducibly generated. We demonstrate, with aid of applied mathematics, that this operation protocol summons the electric-field-dependent microstructure assembly laws of the material into allowing multiple bit data encoding and storage of up to 64 bits of information in a single ferroelectric capacitor.
Show PACS
85.50.Gk Non-volatile ferroelectric memories
84.32.Tt Capacitors
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close