Unveiling Quantum Superparamagnetism by Interacting Monodomains in Multiferroic Er-Doped Bismuth Ferrate Nanostructured Particles

2021 ◽  
Vol 125 (11) ◽  
pp. 6449-6460
Author(s):  
Subhash Sharma ◽  
C. F. Sánchez Valdés ◽  
J. L. Sánchez Llamazares ◽  
J. M. Siqueiros ◽  
Oscar Raymond Herrera
Keyword(s):  
Nanostructured Particles ◽  
Er Doped

Microscopic Structure of Er-Related Optically Active Centers in Si

2003 ◽  
Vol 770 ◽  
Author(s):  
H. Przybylinska ◽  
N. Q. Vinh ◽  
B.A. Andreev ◽  
Z. F. Krasil'nik ◽  
T. Gregorkiewicz
Keyword(s):  
Ground State ◽  
Photoluminescence Spectrum ◽  
Zeeman Effect ◽  
Optically Active ◽  
Single Type ◽  
Active Centers ◽  
Mbe Growth ◽  
Spectral Components ◽  
Er Doped ◽  
Successful Observation

AbstractA successful observation and analysis of the Zeeman effect on the near 1.54 μm photoluminescence spectrum in Er-doped crystalline MBE-grown silicon are reported. A clearly resolved splitting of 5 major spectral components was observed in magnetic fields up to 5.5 T. Based on the analysis of the data the symmetry of the dominant optically active center was conclusively established as orthorhombic I (C2v), with g‼≈18.4 and g⊥≈0 in the ground state. The fact that g⊥≈0 explains why EPR detection of Er-related optically active centers in silicon may be difficult. Preferential generation of a single type of an optically active Er-related center in MBE growth confirmed in this study is essential for photonic applications of Si:Er.

Luminescent Er doped microparticles in a semiconductor matrix

1990 ◽  
Vol 26 (19) ◽  
pp. 1556 ◽  
Author(s):  
P.N. Favennec ◽  
H. L'Haridon ◽  
D. Moutonnet ◽  
M. Salvi ◽  
A.C. Papdopoulo
Keyword(s):  
Semiconductor Matrix ◽  
Er Doped

scholarly journals Comparison of Conventional and Flash Spark Plasma Sintering of Cu–Cr Pseudo-Alloys: Kinetics, Structure, Properties

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 141
Author(s):  
Kirill V. Kuskov ◽  
Mohammad Abedi ◽  
Dmitry O. Moskovskikh ◽  
Illia Serhiienko ◽  
Alexander S. Mukasyan
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Electric Circuits ◽  
Nanostructured Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
The Media ◽  
Copper Chromium ◽  
Kinetics Of ◽  
Structure Properties

Spark plasma sintering (SPS) is widely used for the consolidation of different materials. Copper-based pseudo alloys have found a variety of applications including as electrodes in vacuum interrupters of high-voltage electric circuits. How does the kinetics of SPS consolidation for such alloys depend on the heating rate? Do SPS kinetics depend on the microstructure of the media to be sintered? These questions were addressed by the investigation of SPS kinetics in the heating rate range of 0.1 to 50 K/s. The latter conditions were achieved through flash spark plasma sintering (FSPS). We also compared the sintering kinetics for the conventional copper–chromium mixture and for the mechanically induced copper/chromium nanostructured particles. It was shown that, under FSPS conditions, the observed maximum consolidation rates were 20–30 times higher than that for conventional SPS with a heating rate of 100 K/min. Under the investigated conditions, the sintering rate for mechanically induced composite Cu/Cr particles was 2–4 times higher compared to the conventional Cu + Cr mixtures. The apparent sintering activation energy for the Cu/Cr powder was twice less than that for Cu–Cr mixture. It was concluded that the FSPS of nanostructured powders is an efficient approach for the fabrication of pseudo-alloys.

scholarly journals Temperature sensor based on Er-doped Cascaded-Peanut Taper Structure in-line interferometer in fiber ring laser

2021 ◽  
pp. 1-1
Author(s):  
Weihao Lin ◽  
Fang Zhao ◽  
Li-Yang Shao ◽  
Mang I Vai ◽  
Perry Ping Shum ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Ring Laser ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Er Doped

In-Fiber Macau Zehnder Interferometer Sensor Based on Er doped Fiber Peanut Structure in Fiber Ring Laser

2021 ◽  
pp. 1-1
Author(s):  
Weihao Lin ◽  
Liyang Shao ◽  
Mang I Vai ◽  
Perry Ping Shum ◽  
Liu Shuaiqi ◽  
...  
Keyword(s):  
Ring Laser ◽  
Zehnder Interferometer ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Er Doped

Cladding-pumped Er-doped fiber with absorbing inclusions for suppression of high-order modes

2020 ◽  
Author(s):  
S.S. Aleshkina ◽  
D.S. Lipatov ◽  
M.M. Khudyakov ◽  
T.A. Kashaykina ◽  
V.V. Velmiskin ◽  
...  
Keyword(s):  
High Order ◽  
Er Doped

Electrochemical and microstructure properties of Er-doped CaZrO3

Ionics ◽  
2021 ◽  
Author(s):  
Fei Ruan ◽  
Ruming Wu ◽  
Yang Li ◽  
Jinxiao Bao ◽  
Jianquan Gao ◽  
...  
Keyword(s):  
Er Doped

scholarly journals Phase transformation and light emission in Er-doped Si-rich HfO2 films prepared by magnetron sputtering

2019 ◽  
Vol 37 (3) ◽  
pp. 031503 ◽  
Author(s):  
Tetyana Torchynska ◽  
Brahim El Filali ◽  
Larysa Khomenkova ◽  
Xavier Portier ◽  
Fabrice Gourbilleau
Keyword(s):  
Phase Transformation ◽  
Magnetron Sputtering ◽  
Light Emission ◽  
Er Doped

scholarly journals Design of Aerogels, Cryogels and Xerogels of Alginate: Effect of Molecular Weight, Gelation Conditions and Drying Method on Particles’ Micromeritics

Molecules ◽  
2019 ◽  
Vol 24 (6) ◽  
pp. 1049 ◽  
Author(s):  
Rosalía Rodríguez-Dorado ◽  
Clara López-Iglesias ◽  
Carlos García-González ◽  
Giulia Auriemma ◽  
Rita Aquino ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Physicochemical Properties ◽  
Textural Properties ◽  
Supercritical Drying ◽  
Processing Parameters ◽  
Storage Conditions ◽  
Drying Methods ◽  
Drying Method ◽  
Molecular Weights ◽  
Nanostructured Particles

Processing and shaping of dried gels are of interest in several fields like alginate aerogel beads used as highly porous and nanostructured particles in biomedical applications. The physicochemical properties of the alginate source, the solvent used in the gelation solution and the gel drying method are key parameters influencing the characteristics of the resulting dried gels. In this work, dried gel beads in the form of xerogels, cryogels or aerogels were prepared from alginates of different molecular weights (120 and 180 kDa) and concentrations (1.25, 1.50, 2.0 and 2.25% (w/v)) using different gelation conditions (aqueous and ethanolic CaCl2 solutions) and drying methods (supercritical drying, freeze-drying and oven drying) to obtain particles with a broad range of physicochemical and textural properties. The stability of physicochemical properties of alginate aerogels under storage conditions of 25 °C and 65% relative humidity (ICH-climatic zone II) during 1 and 3 months was studied. Results showed significant effects of the studied processing parameters on the resulting alginate dried gel properties. Stability studies showed small variations in aerogels weight and specific surface area after 3 months of storage, especially, in the case of aerogels produced with medium molecular weight alginate.

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