Results 41 to 50 of about 15,486 (198)

Fast Two-stage Protector Against Electromagnetic Pulse Based on Electroresistance Effect in Polycrystalline La-Sr(Ca)-Mn-O Films

Medžiagotyra, 2014
The electroresistance (ER) effect in polycrystalline films of La0.83Sr0.17MnO3 and La0.7Ca0.3MnO3 was investigated in the temperature range of (5 – 290) K using high power sub-nanosecond rise time electrical pulses with amplitude up to 1 kV.
Laura ŽURAUSKAITĖ, Saulius BALEVIČIUS, Nerija ŽURAUSKIENĖ, Skirmantas KERŠULIS   +3 more
doaj   +1 more source

Magnetic and Magnetocaloric Properties of Nano- and Polycrystalline Bulk Manganites La_0.7Ba_(0.3−x)Ca_xMnO₃ (x ≤ 0.25)

Magnetochemistry, 2023
Here we report the synthesis and investigation of bulk and nano-sized La0.7Ba0.3−xCaxMnO3 (x = 0, 0.15, 0.2 and 0.25) compounds that are promising candidates for magnetic refrigeration applications.
Roman Atanasov, Ecaterina Brinza, Rares Bortnic, Razvan Hirian, Gabriela Souca, Lucian Barbu-Tudoran, Iosif Grigore Deac   +6 more
doaj   +1 more source

Double-exchange is not the cause of ferromagnetism in doped manganites

, 2000
The coexistence of ferromagnetism and metallic conduction in doped manganites has long been explained by a double-exchange model in which the ferromagnetic exchange arises from the carrier hopping. We evaluate the zero-temperature spin stiffness D(0) and
A. Chattopadhyay, A. J. Millis, A. J. Millis, A. K. McMahan, A. Lanzara, A. Machida, A. P. Ramirez, A. S. Alexandrov, A. S. Alexandrov, A. S. Alexandrov, A. Takahashi, C. Zener, D. I. Khomskii, D. Louca, E. B. Stechel, G. M. Zhao, G. M. Zhao, G. M. Zhao, G. M. Zhao, Guo-meng Zhao, H. J. Lee, H. L. Ju, J. A. Fernandez-Baca, J. H. Jung, J. P. Falck, J. W. Lynn, K. Kubo, L. Sheng, M. C. Martin, M. Capone, M. J. Calderon, M. Jaime, M. Quijada, P. W. Anderson, R. H. Heffner, R. von Helmolt, S. Jin, S. Satpathy, S. Yunoki, T. Saitoh, W. E. Pickett, W. E. Pickett, W. E. Pickett, Y. Moritomo, Y. S. Su, Yu. A. Firsov   +45 more
core   +1 more source

Hidden Charge‐Order in the Mixed‐Valent K0.75Li2Cr6O12 High‐Pressure Oxide

Advanced Science, EarlyView.
K0.75Li2Cr6O12 is one of the few mixed valent chromium oxides. It shows a single angle spiral magnetic structure with a k = [1/3 1/3 ¼] propagation vector. Density functional theory reveals a hidden charge order that is necessary to stabilize the antiferromagnetic (AFM) ground state.
Angel M. Arévalo‐López, Clemens Ritter, Marielle Huvé, Olivier Mentré   +3 more
wiley   +1 more source

Tuning Magnetoconductivity in LaMnO₃ NPs through Cationic Vacancy Control

Nanomaterials, 2023
The inclusion of La-Mn vacancies in LaMnO3 nanoparticles leads to a noticeable change in conductivity behavior. The sample retains its overall insulator characteristic, with a typical thermal activation mechanism at high temperatures, but it presents ...
Antonio Hernando, M. Luisa Ruiz-González, Omar Diaz, José M. Alonso, José L. Martínez, Andrés Ayuela, José M. González-Calbet, Raquel Cortés-Gil   +7 more
doaj   +1 more source

Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?

, 2002
A recent vast experimental and theoretical effort in manganites has shown that the colossal magnetoresistance effect can be understood based on the competition of charge-ordered and ferromagnetic phases. The general aspects of the theoretical description
Adams, Adriana Moreo, Aizenman, Argyriou, Attfield, Buhler, Burgy, Castellani, Castro Neto, Cheong, Chernyshev, Dagotto, Dagotto, Dagotto, De Teresa, De Teresa, Decca, Dessau, Elbio Dagotto, Emery, Gor'kov, Hammel, Hellberg, Hotta, Hui, Iguchi, Imry, Imry, Jan Burgy, Khaykovich, Khomskii, Kivelson, Kivelson, Kivelson, Kugel, Lee, Lee, Lynn, Löw, Martin, Martins, Mayr, Moraghebi, Moreo, Moreo, Moreo, Orenstein, Pan, Podzorov, Podzorov, Poilblanc, Renner, Rho, Rodriguez-Martinez, Salamon, Sasaki, Sorella, Takigawa, Tokura, Tranquada, Uehara, White, Yeh, Yeh, Yunoki, Yunoki, Yunoki, Zaanen, Zhang, Zhang   +69 more
core   +1 more source

Phase separation in systems with charge ordering [PDF]

, 2000
A simple model of charge ordering is considered. It is shown explicitly that at any deviation from half-filling ($n \neq 1/2$) the system is unstable with respect to phase separation into charge ordered regions with $n = 1/2$ and metallic regions with ...
Kagan, M. Yu., Khomskii, D. I., Kugel, K. I.   +2 more
core   +4 more sources

High‐Efficiency CO2 Electrolysis Enabled by Interface‐Engineered Composite Electrolytes in Ni‐Based SOEC

Advanced Science, EarlyView.
This study addresses the critical issue of delamination between YSZ and GDC electrolytes in SOECs, which is caused by Thermal deformation disparity. A novel YSZ‐GDC composite interlayer, fabricated using a simple dip‐coating method, is introduced to solve this problem. This layer effectively suppresses delamination by mitigating thermal stress.
Rustam Yuldashev, Hyunchul Jung, Ji Hoon Park, Jin Hee Lee, Min‐Chul Kim   +4 more
wiley   +1 more source

Phase Diagrams and Piezoelectric Properties of Wurtzite Al1−x−yScxGdyN Heterostructural Alloys

Advanced Science, EarlyView.
This study demonstrates ferroelectricity and piezoelectric properties improvement of quaternary wurtzite Al1−x−yScxGdyN${\rm Al}_{1-x-y}{\rm Sc}_x{\rm Gd}_y{\rm N}$ films, guided by density functional theory calculations. Wurtzite Al1−x−yScxGdyN${\rm Al}_{1-x-y}{\rm Sc}_x{\rm Gd}_y{\rm N}$ films have a high optical bandgap, enhanced piezoelectric ...
Julia L. Martin, Cheng‐Wei Lee, Nate S.P. Bernstein, Thi Nguyen, Ande Bryan, Eli Cooper, John S. Mangum, Sage R. Bauers, Andriy Zakutayev, Keisuke Yazawa, Prashun Gorai, Rebecca W. Smaha   +11 more
wiley   +1 more source

Controlling the Magnetic Properties of La_0.9A_0.1Mn_0.9Cr_0.1O₃ (A: Li, K, Na) Powders and Ceramics by Alkali Ions Doping

Magnetochemistry, 2023
Nanocrystalline La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) powders have been synthesized by combustion method. The powders were used to prepare ceramics by high-pressure low-temperature sintering technique.
Paweł Głuchowski, Ruslan Nikonkov, Daniela Kujawa, Wiesław Stręk, Tomas Murauskas, Andrius Pakalniškis, Aivaras Kareiva, Andrii Yaremkevych, Olena Fesenko, Aliaksandr Zhaludkevich, Dmitry Karpinsky   +10 more
doaj   +1 more source