Particle size reduction: A way to enhanced dielectric properties of magnetocapacitive La2/3Ca1/3MnO3

Yáñez-Vilar, S.; Mira, J.; Sánchez-Andújar, M.; Castro-García, S.; Fondado, A.; Rivas, J.; Señarís-Rodríguez, M. A.
April 2010
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p162904
Academic Journal
We report the optimization of the dielectric properties of La2/3Ca1/3MnO3. This is achieved by synthesizing this material with small particle size, strategy that reduces the conductivity of the sample and its dielectric losses, while retaining a reasonably high dielectric permittivity and a good magnetocapacitive response. In order to further improve the properties of these nanoparticles, we have also prepared core-shell composites La2/3Ca1/3MnO3@SiO2 but in this case the magnetocapacitive effect is strongly reduced.


Related Articles

  • Oral absorption of PEG-coated versus uncoated gold nanospheres: does agglomeration matter? Hinkley, Georgia K.; Carpinone, Paul; Munson, John W.; Powers, Kevin W.; Roberts, Stephen M. // Particle & Fibre Toxicology;9/3/2015, Vol. 12 Issue 1, p1 

    Background: Particle size is thought to be a critical factor affecting the bioavailability of nanoparticles following oral exposure. Nearly all studies of nanoparticle bioavailability focus on characterization of the primary particle size of the material as supplied or as dosed, and not on...

  • Particle Focusing and Separation through Lab-On-Chip Device by Dielectrophoresis. Deli Liu; Baoyu Song; Liguo Chen; Lining Sun // Open Mechanical Engineering Journal;2011, Vol. 5, p56 

    A Lab-On-Chip micro-device has been introduced for the focusing and separation of particles which exploits negative dielectrophoretic (nDEP) force. A 3D numerical computational model was presented to simulate the focusing and separation process. In particular, the model will solve for...

  • Optimizing core-shell nanoparticle catalysts with a genetic algorithm. Froemming, Nathan S.; Henkelman, Graeme // Journal of Chemical Physics;12/21/2009, Vol. 131 Issue 23, p234103 

    A genetic algorithm is used with density functional theory to investigate the catalytic properties of 38- and 79-atom bimetallic core-shell nanoparticles for the oxygen reduction reaction. Each particle is represented by a two-gene chromosome that identifies its core and shell metals. The...

  • Measuring nanoparticles. Canter, Neil // Tribology & Lubrication Technology;Jan2010, Vol. 66 Issue 1, p14 

    The article provides information on induced grating, a new technique for measuring nanoparticles, which was developed by Shimadzu Scientific Instruments Inc. It states that the technique, also known commercially as the IG-1000 single nanoparticle size analyzer, accurately measures size and...

  • Formation of core/shell-like ZnSe1-xTex nanocrystals due to equilibrium surface segregation. Pandey, Sumeet C.; Mountziaris, T. J.; Venkataraman, D.; Maroudas, Dimitrios // Applied Physics Letters;5/17/2010, Vol. 96 Issue 20, p201910 

    We report results of equilibrium surface segregation in ZnSe1-xTex nanocrystals based on a computational analysis of coupled compositional, structural, and volume relaxation of the nanocrystals that employs Monte Carlo and conjugate-gradient methods according to a first-principles-parameterized...

  • Controlled growth of Co nanoparticle assembly on nanostructured template Al2O3/NiAl(100). Wen-Chin Lin; Shen-Shing Wong; Po-Chun Huang; Chii-Bin Wu; Bin-Rui Xu; Cheng-Tien Chiang; Hong-Yu Yen; Minn-Tsong Lin // Applied Physics Letters;10/9/2006, Vol. 89 Issue 15, p153111 

    Based on the systematic studies of the growth temperature, deposition rate, and annealing effects, the control of Co nanoparticle density, size, and alignment is demonstrated to be feasible on a nanostructured template Al2O3/NiAl(100). At 140–170 K, a slow deposition rate (0.027 ML/min)...

  • Template-directed synthesis: Producing 'perfect' particles. Breiner, Boris; Nitschke, Jonathan R. // Nature Chemistry;Jan2010, Vol. 2 Issue 1, p6 

    The article offers information on the importance of producing perfect nanoparticles. It cites the significance of controlling the size and shape of the particles because their properties to function rely on their characteristics. It notes that the evolution of methods that can produce samples of...

  • MONITORING NANOPARTICLE AGGREGATION BY COHERENT LIGHT SCATTERING MEASUREMENTS. Chicea, D. // Annals of the West University of Timisoara, Physics Series;2010, Vol. 54, p42 

    In this work a modified Dynamic Light Scattering particle sizing experiment was conducted to assess the variation in time of the average diameter of the ferrite nanoparticle aggregates in diluted aqueous suspension.

  • Experimental study of small-scale particles in atmospheric brown clouds. Adushkin, V.; Popel, S.; Chen, B.; Weidler, P.; Friedrich, F. // Doklady Earth Sciences;Dec2012, Vol. 447 Issue 2, p1317 

    The article presents the findings of a study conducted on small-scale particles found in atmospheric brown clouds (ABC) in Central Asia region. It discusses the classification of particles on the basis of sizes, as nanoparticles and microparticles effectively influence the screening of solar...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics