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 May 2011

Volume 98, Issue 20, Articles (20xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 98, 201101 (2011); http://dx.doi.org/10.1063/1.3590716 (3 pages)

Martynas Beresna, Mindaugas Gecevičius, Peter G. Kazansky, and Titas Gertus
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Resonant excitation of coherent Cerenkov radiation in dielectric lined waveguides

G. Andonian, O. Williams, X. Wei, P. Niknejadi, E. Hemsing, J. B. Rosenzweig, P. Muggli, M. Babzien, M. Fedurin, K. Kusche, R. Malone, and V. Yakimenko

Appl. Phys. Lett. 98, 202901 (2011); http://dx.doi.org/10.1063/1.3592579 (3 pages) | Cited 2 times

Online Publication Date: 18 May 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report the observation of coherent Cerenkov radiation in the terahertz regime emitted by a relativistic electron pulse train passing through a dielectric lined cylindrical waveguide. We describe the beam manipulations and measurements involved in repetitive pulse train creation including comb collimation and nonlinear optics corrections. With this technique, modes beyond the fundamental are selectively excited by use of the appropriate frequency train. The spectral characterization of the structure shows preferential excitation of the fundamental and of a higher longitudinal mode.
Show PACS
42.65.Wi Nonlinear waveguides
41.60.Bq Cherenkov radiation
42.79.Gn Optical waveguides and couplers
42.79.Ag Apertures, collimators

Photovoltaic properties of Bi2FeCrO6 epitaxial thin films

R. Nechache, C. Harnagea, S. Licoccia, E. Traversa, A. Ruediger, A. Pignolet, and F. Rosei

Appl. Phys. Lett. 98, 202902 (2011); http://dx.doi.org/10.1063/1.3590270 (3 pages) | Cited 5 times

Online Publication Date: 19 May 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report a large photovoltaic (PV) effect in multiferroic Bi2FeCrO6 (BFCO) films under monochromatic illumination at 635 nm with an intensity of 1.5 mW cm−2. These multiferroic films exhibit a large photocurrent at zero bias voltage and an open-circuit voltage of about 0.6 V. A high PV power conversion efficiency of about 6% for red light is achieved and attributed to a high degree of B-site cationic ordering between Fe and Cr sublattices, the tuning of which is likely to play a key role in further improvements of the PV properties in BFCO.
Show PACS
73.50.Pz Photoconduction and photovoltaic effects
75.85.+t Magnetoelectric effects, multiferroics
77.55.Nv Multiferroic/magnetoelectric films

Real-space mapping of dynamic phenomena during hysteresis loop measurements: Dynamic switching spectroscopy piezoresponse force microscopy

A. Kumar, O. S. Ovchinnikov, H. Funakubo, S. Jesse, and S. V. Kalinin

Appl. Phys. Lett. 98, 202903 (2011); http://dx.doi.org/10.1063/1.3590919 (3 pages) | Cited 2 times

Online Publication Date: 20 May 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Dynamic switching spectroscopy piezoresponse force microscopy is developed to separate thermodynamic and kinetic effects in local bias-induced phase transitions. The approaches for visualization and analysis of five-dimensional data are discussed. The spatial and voltage variability of relaxation behavior of the a-c domain lead zirconate-titanate surface suggest the interpretation in terms of surface charge dynamics. This approach is applicable to local studies of dynamic behavior in any system with reversible bias-induced phase transitions ranging from ferroelectrics and multiferroics to ionic systems such as batteries, fuel cells, and electroresistive materials.
Show PACS
77.80.Dj Domain structure; hysteresis
77.65.-j Piezoelectricity and electromechanical effects
77.84.Cg PZT ceramics and other titanates

Low temperature phenomena in ferroic BiMO3–PbTiO3 (M: Mn and Sc)

M. Algueró, R. Jiménez, H. Amorín, E. Vila, and A. Castro

Appl. Phys. Lett. 98, 202904 (2011); http://dx.doi.org/10.1063/1.3591176 (3 pages)

Online Publication Date: 20 May 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Low temperature, reversible mechanical effects in BiMnO3–PbTiO3 are shown to be analogous to those reported in multiferroic BiFeO3. The same stiffening (on cooling) has been found in ferroelectric BiScO3–PbTiO3 that shows negligible conduction. This has allowed permittivity and polarization studies, not possible in BiMnO3–PbTiO3, to be accomplished. Results indicate mechanical effects to be associated with a phase transition, most probably governed by an order parameter other than electric polarization, but to which it is coupled. The possibility of a common origin for the effects in the three Bi-containing perovskites is discussed, along with implications on the multiferroicity of BiMnO3–PbTiO3.
Show PACS
81.40.Jj Elasticity and anelasticity, stress-strain relations
62.20.de Elastic moduli
77.22.Ch Permittivity (dielectric function)
77.80.B- Phase transitions and Curie point
77.84.Cg PZT ceramics and other titanates
77.22.Ej Polarization and depolarization
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close