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1. Perfect valley filter controlled by Fermi velocity modulation in graphene

Author:
Lins, A.R.S.; Lima, Jonas R.F.
Source:
Carbon 2020 v.160 pp. 353-360
ISSN:
0008-6223
Subject:
magnetism,   etc   ; equations; graphene; transmittance;     Show all 4 Subjects
Abstract:
... In this work we investigate the effects of a Fermi velocity modulation in a valley filter in graphene created by a combination of a magnetic and electric barrier. With the effective Dirac equation of the system, we use the transfer matrix formalism to obtain the transmittance. We verify that the valley transport in graphene is very sensitive to a Fermi velocity modulation, which is able to choose ...
DOI:
10.1016/j.carbon.2020.01.031

2. Using Remote Fields for Complex Tissue Engineering

Author:
Armstrong, James P.K.; Stevens, Molly M.
Source:
Trends in biotechnology 2020 v.38 no.3 pp. 254-263
ISSN:
0167-7799
Subject:
magnetism,   etc   ; acoustics; tissue engineering;     Show all 3 Subjects
Abstract:
... Great strides have been taken towards the in vitro engineering of clinically relevant tissue constructs using the classic triad of cells, materials, and biochemical factors. In this perspective, we highlight ways in which these elements can be manipulated or stimulated using a fourth component: the application of remote fields. This arena has gained great momentum over the last few years, with a r ...
DOI:
10.1016/j.tibtech.2019.07.005
PubMed:
31439372
PubMed Central:
PMC7023978

3. Tunable Magnetoelastic Effects in Voltage-Controlled Exchange-Coupled Composite Multiferroic Microstructures

Author:
Xiao, Z.; Lo Conte, R.; Goiriena-Goikoetxea, M.; Chopdekar, R. V.; Lambert, C.-H. A.; Li, X.; N’Diaye, A. T.; Shafer, P.; Tiwari, S.; Barra, A.; Chavez, A.; Mohanchandra, K. P.; Carman, G. P.; Wang, K. L.; Salahuddin, S.; Arenholz, E.; Bokor, J.; Candler, R. N.
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6752-6760
ISSN:
1944-8252
Subject:
magnetism,   etc   ; computer hardware; microstructure; nickel;     Show all 4 Subjects
Abstract:
... The magnetoelectric properties of exchange-coupled Ni/CoFeB-based composite multiferroic microstructures are investigated. The strength and sign of the magnetoelastic effect are found to be strongly correlated with the ratio between the thicknesses of two magnetostrictive materials. In cases where the thickness ratio deviates significantly from one, the magnetoelastic behavior of the multiferroic ...
DOI:
10.1021/acsami.9b20876

4. Thermodynamic properties of the solid solution Tb2O3·2ZrO2

Author:
Guskov, V.N.; Gagarin, P.G.; Tyurin, A.V.; Guskov, A.V.; Gavrichev, K.S.
Source:
Thermochimica acta 2020 v.689 pp. 178596
ISSN:
0040-6031
Subject:
magnetism,   etc   ; calorimetry; electron microscopy; heat; temperature;     Show all 5 Subjects
Abstract:
... The temperature dependence for molar heat capacity of the solid solution Tb₂O₃·2ZrO₂ has been determined by adiabatic calorimetry (6–340 K). Based on the smoothed values of molar heat capacity, thermodynamic functions of Tb₂O₃·2ZrO₂ have been calculated without regard for very low temperature (<6 K) magnetic transformations. The studies have been performed on samples characterized by chemical, pha ...
DOI:
10.1016/j.tca.2020.178596

5. MHD flow and heat transfer near stagnation point over a stretching/shrinking surface with partial slip and viscous dissipation: Hybrid nanofluid versus nanofluid

Author:
Aly, Emad H.; Pop, I.
Source:
Powder technology 2020 v.367 pp. 192-205
ISSN:
0032-5910
Subject:
magnetism,   etc   ; equations; heat transfer; nanofluids; temperature;     Show all 5 Subjects
Abstract:
... The steady magnetohydrodynamic stagnation point flow and heat transfer over a stretching/shrinking surface in a hybrid nanofluid with partial slip and viscous dissipation were theoretically/numerically studied. The governing equations of the problem were turned into ODEs by using appropriate transformations. The plots of most important parameters were presented for both surfaces. It was found that ...
DOI:
10.1016/j.powtec.2020.03.030

6. Reliable Euler deconvolution estimates throughout the vertical derivatives of the total-field anomaly

Author:
Melo, Felipe F.; Barbosa, Valéria C.F.
Source:
Computers & geosciences 2020 v.138 pp. 104436
ISSN:
0098-3004
Subject:
magnetism,   etc   ; computers; standard deviation; surveys; uncertainty; Brazil;     Show all 6 Subjects
Abstract:
... We propose a novel methodology to select reliable Euler deconvolution estimates throughout the vertical derivatives of the total-field anomaly, grounded on the capability of this quantity to locate anomalies due to its higher signal decay with distance. In applying Euler deconvolution to a small moving-data window, we compute the standard deviation of the vertical derivatives of the total-field an ...
DOI:
10.1016/j.cageo.2020.104436

7. Characterization of Magnetic Series of Iron–Carbon Clusters FeₙC⁰,±¹ (n ≤ 13)

Author:
Limon, Patricio; Miralrio, Alan; Castro, Miguel
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 9484-9495
ISSN:
1932-7455
Subject:
magnetism,   etc   ; carbon; chemical bonding; ionization; iron;     Show all 5 Subjects
Abstract:
... The evolution of structural and electronic properties of neutral and charged iron clusters doped with a single carbon atom, FeₙC⁰,±¹ (n = 1–13) series, is studied in this work, which has been carried out throughout all-electron density functional calculations at the BPW91/6-311++G(2d,2p) level of theory. The results indicate a redshift of the bands in the infrared spectra due to carbon–iron stretc ...
DOI:
10.1021/acs.jpcc.9b11805

8. Critical Control of Highly Stable Nonstoichiometric Mn–Zn Ferrites with Outstanding Magnetic and Electromagnetic Performance for Gigahertz High-Frequency Applications

Author:
Yang, Yang; Liu, Lidong; Zhu, Hangfei; Bao, Nina; Ding, Jun; Chen, Jing; Yu, Kuai
Source:
ACS applied materials & interfaces 2020 v.12 no.14 pp. 16609-16619
ISSN:
1944-8252
Subject:
magnetism,   etc   ; annealing; heat; manganese; temperature; zinc;     Show all 6 Subjects
Abstract:
... Pristine nonstoichiometric Mn–Zn ferrites were synthesized using a facile “heating-up” method. A route for achieving very stable single-crystal spinel Mn–Zn ferrites with enhanced magnetic performance and Curie temperature was explored using annealing procedures, where the protective gas flow velocities, heating rates, and annealing temperatures were critical in determining the phase structures an ...
DOI:
10.1021/acsami.0c00920

9. Effect of a magnetic pulse on orientation behavior in rainbow trout (Oncorhynchus mykiss)

Author:
Fitak, Robert R.; Wheeler, Benjamin R.; Johnsen, Sönke
Source:
Behavioural processes 2020 v.172 pp. 104058
ISSN:
0376-6357
Subject:
magnetism,   etc   ; Oncorhynchus mykiss; animals; juveniles; magnetite; storms;     Show all 6 Subjects
Abstract:
... Magnetoreception remains one of the most enigmatic of animal senses. Rainbow trout (Oncorhynchus mykiss) represent an ideal species to study this sense, as magnetoreception based upon microscopic particles of magnetite is suspected to play an important role in their orientation and navigation. Here we found that compared with controls, a magnetic pulse (a treatment commonly used to demonstrate mag ...
DOI:
10.1016/j.beproc.2020.104058

10. Enhanced Widefield Quantum Sensing with Nitrogen-Vacancy Ensembles Using Diamond Nanopillar Arrays

Author:
McCloskey, Daniel J.; Dontschuk, Nikolai; Broadway, David A.; Nadarajah, Athavan; Stacey, Alastair; Tetienne, Jean-Philippe; Hollenberg, Lloyd C. L.; Prawer, Steven; Simpson, David A.
Source:
ACS applied materials & interfaces 2020 v.12 no.11 pp. 13421-13427
ISSN:
1944-8252
Subject:
magnetism,   etc   ; image analysis; mechanical stress; photoluminescence;     Show all 4 Subjects
Abstract:
... Surface micro- and nano-patterning techniques are often employed to enhance the optical interface to single photoluminescent emitters in diamond, but the utility of such surface structuring in applications requiring ensembles of emitters is still open to investigation. Here, we demonstrate scalable and fault-tolerant fabrication of closely packed arrays of fluorescent diamond nanopillars, each hos ...
DOI:
10.1021/acsami.9b19397

11. Squares of gold atoms and linear infinite chains of Cd atoms as building units in the intermetallic phases REAu₄Cd₂ (RE=La–Nd, Sm) with YbAl₄Mo₂-type structure

Author:
Paulsen, Christian; Block, Theresa; Benndorf, Christopher; Oeckler, Oliver; Bönnighausen, Judith; Janka, Oliver; Pöttgen, Rainer
Source:
Zeitschrift für Naturforschung 2020 v.75 no.1-2 pp. 73-82
ISSN:
1865-7117
Subject:
magnetism,   etc   ; X-radiation; cadmium; gold; ions; tantalum;     Show all 6 Subjects
Abstract:
... The gold-rich intermetallic compounds REAu₄Cd₂ (RE = La–Nd, Sm) were synthesized from the elements in sealed tantalum ampoules. Their characterization by X-ray powder and single crystal data confirmed the tetragonal YbAl₄Mo₂ type, space group I4/mmm. The basic building units are Au₄ squares (278 pm Au–Au in CeAu₄Cd₂) and infinite linear cadmium chains (275 pm Cd–Cd in CeAu₄Cd₂). We exemplarily stu ...
DOI:
10.1515/znb-2019-0153

12. Mn-Doped Sr/Si(111)-(3 × 2) HCC Surfaces: Antiferromagnetic Semiconductors for Spintronic Applications

Author:
Chai, Jun-Shuai; Wang, Jian-Tao; Xu, Li-Fang
Source:
ACS applied materials & interfaces 2020 v.12 no.8 pp. 9918-9924
ISSN:
1944-8252
Subject:
magnetism,   etc   ; ferrimagnetic materials; manganese; semiconductors; silicon; strontium;     Show all 6 Subjects
Abstract:
... Manganese and manganese silicide as promising candidates for spintronic applications have attracted great interest in recent years. Here, we adopt Sr-induced Si(111)-(3 × 2) honeycomb-chain channel (HCC) surface as a template and perform a systematical study on the structural stability and magnetic and electronic properties of Mn-doped Sr/Si(111)-(3 × 2) HCC surfaces by ab initio calculations. Our ...
DOI:
10.1021/acsami.9b20294

13. Advances in polyaniline-based nanocomposites

Author:
Singh, Pratibha; Shukla, S. K.
Source:
Journal of materials science 2020 v.55 no.4 pp. 1331-1365
ISSN:
0022-2461
Subject:
magnetism,   etc   ; catalysts; electrochemistry; energy; nanocomposites; photochemistry;     Show all 6 Subjects
Abstract:
... In this review article, synthesis, properties and applications of polyaniline-based nanocomposites (PANI-NCs) have been described. Different methods (viz chemical, electrochemical, photochemical and mechano-chemical) and size confinement tools used for preparation of PANI-NC are described with their advantageous and disadvantageous features. On the basis of synergized electrical, magnetic, optical ...
DOI:
10.1007/s10853-019-04141-z

14. Magnetic vortex core-shell Fe3O4@C nanorings with enhanced microwave absorption performance

Author:
Wang, Xiao; Pan, Fei; Xiang, Zhen; Zeng, Qingwen; Pei, Ke; Che, Renchao; Lu, Wei
Source:
Carbon 2020 v.157 pp. 130-139
ISSN:
0008-6223
Subject:
magnetism,   etc   ; carbon; holography; iron oxides; permeability;     Show all 5 Subjects
Abstract:
... Fabricating microwave absorbers (MA) with strong attenuation capability and lightweight is still a challenge problem, which limit their further applications in our daily life. Herein, magnetic vortex core-shell Fe3O4@C nanorings (FNR-C) with excellent microwave absorption property have been successfully prepared by a facile strategy. Electron holography analysis is carried out to detect the magnet ...
DOI:
10.1016/j.carbon.2019.10.030

15. Theoretical and experimental developments in quantum spin liquid in geometrically frustrated magnets: a review

Author:
Shaginyan, V. R.; Stephanovich, V. A.; Msezane, A. Z.; Japaridze, G. S.; Clark, J. W.; Amusia, M. Ya.; Kirichenko, E. V.
Source:
Journal of materials science 2020 v.55 no.6 pp. 2257-2290
ISSN:
0022-2461
Subject:
magnetism,   etc   ; magnetic materials; momentum; prediction; thermodynamics;     Show all 5 Subjects
Abstract:
... The exotic substances have exotic properties. One class of such substances is geometrically frustrated magnets, where correlated spins reside in the sites of triangular or kagomé lattice. In some cases, such magnet would not have long-range magnetic order. Rather, its spins tend to form kind of pairs, called valence bonds. At [Formula: see text] these highly entangled quantum objects condense in t ...
DOI:
10.1007/s10853-019-04128-w

16. Multiple Resonance Metamaterial Emitter for Deception of Infrared Emission with Enhanced Energy Dissipation

Author:
Lee, Namkyu; Yoon, Boram; Kim, Taehwan; Bae, Ji-Yeul; Lim, Joon-Soo; Chang, Injoong; Cho, Hyung Hee
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8862-8869
ISSN:
1944-8252
Subject:
magnetism,   etc   ; cameras; cooling; energy; optical properties;     Show all 5 Subjects
Abstract:
... Artificial camouflage surfaces for assimilating with the environment have been utilized for controlling optical properties. Especially, the optical properties of infrared (IR) camouflage materials should be satisfied with two requirements: deception of IR signature in a detected band through reduced emissive energy and dissipation of reduced emissive energy for preventing thermal instability throu ...
DOI:
10.1021/acsami.9b21030

17. Modeling and experimental verification of a fractional damping quad-stable energy harvesting system for use in wireless sensor networks

Author:
Gao, Mingyuan; Wang, Yuan; Wang, Yifeng; Yao, Ye; Wang, Ping; Sun, Yuhua; Xiao, Jieling
Source:
Energy 2020 v.190 pp. 116301
ISSN:
0360-5442
Subject:
magnetism,   etc   ; aluminum; copper; energy; magnetic materials; models;     Show all 6 Subjects
Abstract:
... This paper presents the theoretical modeling and experimental verification of a quad-stable non-linear electromagnetic-induction energy harvesting (QEH) system. The suspended magnet of the QEH system consists of two aluminum caps that are circumferentially filled with copper beads for smooth axial movement. A QEH system model having fractional damping is established. Experimental investigations re ...
DOI:
10.1016/j.energy.2019.116301

18. Best Practices for Characterization of Magnetic Nanoparticles for Biomedical Applications

Author:
Sandler, Sarah E.; Fellows, Benjamin; Mefford, O. Thompson
Source:
Analytical chemistry 2019 v.91 no.22 pp. 14159-14169
ISSN:
1520-6882
Subject:
magnetism,   etc   ; analytical methods; nanoparticles;     Show all 3 Subjects
Abstract:
... The use of magnetic nanoparticles in biomedical applications provides are a wealth of opportunities. Nonetheless, to truly understand the interactions of these materials in biological media, detailed characterization is necessary with these complex systems. This Feature highlights some “best practices” in the analytical techniques and challenges in the measurement of the properties of these materi ...
DOI:
10.1021/acs.analchem.9b03518

19. Strain Gradient Mediated Magnetism and Polarization in Monolayer VSe₂

Author:
Shi, Wenhao; Guo, Yufeng; Zhang, Zhuhua; Guo, Wanlin
Source:
Journal of physical chemistry 2019 v.123 no.40 pp. 24988-24993
ISSN:
1932-7455
Subject:
magnetism,   etc   ; chemical bonding; deformation;     Show all 3 Subjects
Abstract:
... To explore the coupling of spin magnetization and charge polarization is an intriguing aspect for low-dimensional materials. Here, we use first-principles calculations to unveil a particular magnetoelectric state consisting of flexomagnetism and flexoelectricity in VSe₂ monolayers when they are wrinkled or corrugated. Due to the anomalous V–Se bond structures caused by the flexural deformation and ...
DOI:
10.1021/acs.jpcc.9b08445

20. Axially Chiral peri-Xanthenoxanthenes as a Circularly Polarized Luminophore

Author:
Takaishi, Kazuto; Hinoide, Sakiko; Matsumoto, Tomoki; Ema, Tadashi
Source:
Journal of the American Chemical Society 2019 v.141 no.30 pp. 11852-11857
ISSN:
1520-5126
Subject:
magnetism,   etc   ; fluorescence; naphthalene;     Show all 3 Subjects
Abstract:
... A series of axially chiral peri-xanthenoxanthenes (PXXs) were synthesized from 1,1′-bi-2-naphthol without optical resolution. These are the first examples of chiral PXXs. Among them, PXX 5 with two naphthalene rings connected via a methylenedioxy bridge and a chiral axis displayed intense fluorescence (FL) and circularly polarized luminescence (CPL) both in solution (ΦFL of 0.72 and |gₗᵤₘ| of 1.4 ...
DOI:
10.1021/jacs.9b06240