Article
Materials Science, Multidisciplinary
Doudou Zhang, Haibo Yuan, Yaxin Sun, Mingsi Shen, Xiao Yu, Xinyu Ma, Peng Wang, Juan Liu, Hailing Li, Hongwei Zhou
Summary: Nanocrystalline superconducting MgB2 bulks with improved upper critical field Hc2(0) were prepared without severe suppression of superconducting transition temperature Tc by high pressure sintering of ball milled MgB2 powders. The band gap Δσ(0) decreases with the decrease in grain size to 20 nm, while Δπ(0) remains nearly fixed. The nanocrystalline bulks are both in the dirty limit, with ratios of mean free path to the BCS coherence lengths significantly less than 1, and intraband scatterings contribute to the enhancement of Hc2(0).
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Correction
Physics, Applied
Evgeny F. Talantsev
Summary: Equations (35)-(37) in the original article were found to have misprints and this Corrigendum provides the correct versions of these equations. The author confirms that the misprints only occurred in the printed versions of the equations, and the data analysis reported in the article was performed using the correct versions of these equations.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Mechanics
Yang Shi, Baoxin Lei, Yongkun Wang, Junjie Ye
Summary: This paper presents an analytical model to evaluate the self-bias magnetoelectric effect of magnetization-graded magnetoelectric composites under extensional-bending coupled vibration. The results indicate the availability of self-bias magnetic field in the composites, which can enhance the self-bias magnetoelectric coupling and adjust the resonance frequency by applying tensile stress or increasing the thickness of the high-permeability layer.
COMPOSITE STRUCTURES
(2022)
Article
Physics, Multidisciplinary
Yasunao Otsuki, Shojiro Kimura, Satoshi Awaji, Motohiro Nakano
Summary: This Letter demonstrates a novel mechanism to enhance the magnetoelectric (ME) coupling between electric polarization and magnetism using the dynamic Jahn-Teller (JT) effect. An electric polarization of over 100 mu C/m(2) is induced by the magnetic field through the second-order ME effect in the noncentrosymmetric transition metal complex [Mn-III(taa)], without requiring magnetic order. The electric polarization is one order larger than that induced by the second-order ME effect, originating from p-d hybridization. The alignment of the JT distortion by the magnetic field results in the observed large electric polarization. This provides a new method to achieve strong ME coupling by tuning the atomic displacement using a magnetic field.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Hengpei Liao, Anthony R. Dennis, Weijia Yuan, Min Zhang
Summary: In this study, the magnetization characteristics of HTS-stacked ring magnets were investigated. It was found that the trapped field in the magnets was higher than the applied field during field cooling magnetization. By inserting HTS stacks into the hollow cavity of the ring magnets, the center field no longer exhibited an increased value. These findings have important implications for the design and application of superconducting magnets.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
E. Campillo, R. Riyat, S. Pollard, P. Jefferies, A. T. Holmes, R. Cubitt, J. S. White, J. Gavilano, Z. Huesges, O. Stockert, E. M. Forgan, E. Blackburn
Summary: The vortex lattice structure in CeCu2Si2 is close to a regular hexagon and is strongly limited by the Pauli paramagnetic effect. At lower temperatures, increasing magnetic field leads to an increase in magnetization of flux line cores, followed by a rapid decrease. Pairing in this material may be due to the effect of magnetic fluctuations rather than a d-wave order parameter.
Article
Chemistry, Physical
Yuxian Wu, Zhiwei Wen, Yong Li, Yajing Cui, Yongliang Chen, Yong Zhao
Summary: The transport properties, magnetization, and dynamic magnetization relaxation rate of (Li0.8Fe0.2)OHFeSe single crystals were investigated at various magnetic fields and temperatures. The results show a transition in vortex motion from elastic to plastic motion, indicating the presence of a peak effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
Riffat Munir, K. A. M. Hasan Siddiquee, Charuni Dissanayake, Xinzhe Hu, Yasumasa Takano, Eun Sang Choi, Yasuyuki Nakajima
Summary: This study reports superconductivity in Sn(x)NbSe2-delta and finds that the superconducting transition temperature of the compound is highly sensitive to different Sn concentrations and Se deficiencies. It suggests that a possible odd-parity contribution dominates the superconducting gap function, which can be fine-tuned by the Sn concentration and Se deficiency.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Junya Endo, Hiroyasu Matsuura, Masao Ogata
Summary: We study the properties of the upper critical field in nodal-line semimetals using a continuous model with a nodal line on the kz = 0 plane. By utilizing the semiclassical Green's function method, we calculate the upper critical field for both the dirty limit and the clean limit. Our results reveal the significant anisotropy of the upper critical field magnitude and the unconventional temperature dependence. These findings are compared with experimental data of PbTaSe2.
Article
Chemistry, Multidisciplinary
H. Wu, H. Ao, W. Li, Z. Zeng, R. Gao, C. Fu, G. Chen, X. Deng, Z. Wang, X. Lei, W. Cai
Summary: BST and CCFO nanopowders were prepared by different methods and used to create BST-CCFO multiferroic fluids with various mass ratios. Interestingly, the multiferroic fluid formed a chain structure under the external magnetic field, enhancing the magnetoelectric performance significantly.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Swarnamayee Mishra, Premakumar Yanda, A. Sundaresan
Summary: In a quasi-two-dimensional planar antiferromagnet BaNi2(PO4)(2), a long-range antiferromagnetic ordering of Ni2+ ions at T-N = 24 K was observed. Interestingly, an electric polarization proportional to the applied magnetic fields was induced at T-N, demonstrating the linear magnetoelectric effect with a coupling coefficient of 1.67 ps/m in BaNi2(PO4)(2). The magnetic symmetry associated with the magnetoelectric effect (1) over bar' allows all tensor elements of the magnetoelectric susceptibility.
Article
Physics, Applied
K. Yakinci
Summary: Superconducting FeTe0.5Se0.5+Ag single-crystal samples with different Ag concentrations were successfully prepared and characterized. The properties of the samples improved up to 3% Ag addition, but deteriorated for higher Ag concentrations. The highest performance was obtained in the 3% Ag-added sample. This study provides valuable insights into the effect of Ag concentration on the properties of FeTe0.5Se0.5+Ag superconductors.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Acoustics
Yining Shen, Xiang Pan, Yuanxin Xu, Yuxiao Li, Xinyi Ren
Summary: This paper focuses on the inversion of a range-dependent environment using a synthetic aperture created by moving sensors in the presence of the Doppler effect. A derivation is provided to obtain an equivalent range-independent environmental model, and the received fields are modified using the Doppler-shifted wavenumbers. The proposed inversion method is verified through simulations and the SWellEx-96 experimental data.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
E. B. Magadeev, R. M. Vakhitov
Summary: In this work, the effect of inhomogeneous magnetoelectric interaction on the distribution of magnetization in insulating ferromagnetic films with strong easy-plane anisotropy is theoretically studied. It is found that structures of various topologies can form in such films depending on the magnitude of the applied electric field. The optimal control of the magnetic structure can be achieved by the field of a charged filament. All stable and metastable states of the system are studied in detail depending on the field strength and material parameters of the film.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Armando Galluzzi, Antonio Leo, Andrea Masi, Francesca Varsano, Angela Nigro, Gaia Grimaldi, Massimiliano Polichetti
Summary: This study focuses on the vortex phase diagram of CaKFe4As4, which is helpful for understanding the applicative ranges in field and temperature of these materials. Different magnetic measurements were performed to draw a complete vortex phase diagram for a CaKFe4As4 polycrystalline iron-based superconductor, revealing a second magnetization peak effect and a transition in the vortex lattice from elastic to plastic behavior.
APPLIED SCIENCES-BASEL
(2023)
