Article
Materials Science, Multidisciplinary
Yuxuan Sun, Yuwei Ju, Hao Wen, Ruiqi Liu, Quanliang Cao, Liang Li
Summary: This research proposes a novel hybrid-excited magnetic actuation approach that combines permanent magnets and electromagnets, achieving a balance between flexibility and energy efficiency. They also develop a magnetic soft gripper system capable of versatile object manipulation and demonstrate its exceptional performance through experiments.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Kaiming Shen, Lixian Li, Funan Tan, Shuo Wu, Tianli Jin, Jingxiang You, Mun Yin Chee, Yunfei Yan, Wen Siang Lew
Summary: This study synthesized hollow spherical magnetic nanoparticles with topological magnetic domain structures and demonstrated their enhanced heating efficiency in cancer hyperthermia therapy. The nanoparticles showed higher specific absorption rate (SAR) value compared to solid nanoparticles, potentially making them effective heat generators for magnetic hyperthermia therapy.
Article
Materials Science, Multidisciplinary
Pablo San-Jose, Carlos Paya, C. M. Marcus, S. Vaitiekenas, Elsa Prada
Summary: Full-shell nanowires are hybrid nanostructures with a semiconducting core and a superconducting shell. We theoretically show that these nanowires can exhibit CdGM analogs, which are subgap states induced by the shell. The skewness of the CdGM analogs inside nonzero LP lobes can be used to extract microscopic information.
Article
Quantum Science & Technology
R. Badea, M. S. Wolf, J. Berezovsky
Summary: We study experimentally and numerically the implementation of 7r/2 rotations of a single nitrogen-vacancy defect spin state near a magnetic vortex core. The controlled dynamics of the vortex core can offer rapidly-tunable magnetic fields for spin qubit control, but the non-equilibrium dynamics of the vortex core complicate high-fidelity gate operations. The complex profile of the driven vortex core fringe field leads to unpredictable enhancement of Zeeman splitting and Rabi frequency, and the gyrotropic dynamics of the vortex core result in a complicated evolution of the spin state. Adiabatic passage protocol is shown to improve the fidelity of pi/2 rotations by enhancing spin splitting and Rabi frequency while suppressing unwanted vortex dynamics.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Nuclear
M. A. Cardona, D. Hojman, B. Roussiere, I Deloncle, N. Barre-Boscher, M. Cheikh Mhamed, E. Cottereau, B. Dimitrov, G. Tz Gavrilov, A. Gottardo, C. Lau, S. Roccia, S. Tusseau-Nenez, D. Verney, M. S. Yavahchova
Summary: The study on low-spin states of La-145 revealed a new level scheme and discussed the half-lives and configurations of excited states. The research findings have enhanced our understanding of this nucleus.
Article
Physics, Applied
Mykola I. I. Sloika, Yuri Gaididei, Volodymyr P. P. Kravchuk, Oleksandr V. V. Pylypovskyi, Denys Makarov, Denis D. D. Sheka
Summary: The geometric curvature of nanoscale magnetic shells induces curvature-induced anisotropy and Dzyaloshinskii-Moriya interaction (DMI), which have significant effects on the size and morphology of the magnetic vortex core.
LOW TEMPERATURE PHYSICS
(2022)
Article
Mathematics, Applied
Peng Luo, Shuangjie Peng, Juncheng Wei, Shusen Yan
Summary: We study the behavior of Bose-Einstein condensates in two or three dimensions with attractive interactions, describing them with the L-2 constraint Gross-Pitaevskii energy functional. By analyzing the precise description of the chemical potential and attractive interaction, as well the specific degenerate trapping potential, we have obtained new results regarding the existence and local uniqueness of excited states. This analysis on the degenerate trapping potential with non-isolated critical points provides insights into ground states of BEC and singularly perturbed nonlinear Schrodinger equations.
CALCULUS OF VARIATIONS AND PARTIAL DIFFERENTIAL EQUATIONS
(2021)
Article
Chemistry, Physical
Guibing Shi, Xiaolu Hu, Yifan Lai, Jianhua Wu, Mingxu Wang, Xuelian Li, Chuanxiao Peng, Zongzhen Li, Li Wang
Summary: By tuning the mass ratio of powders, the electromagnetic performance and frequency properties of nanocrystalline soft magnetic composites were balanced, leading to improved comprehensive performance and potential application in high-frequency inductance components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Thermodynamics
Junwu Kan, Weilin Liao, Shuyun Wang, Song Chen, Xin Huang, Zhonghua Zhang
Summary: A piezoelectric wind energy harvester excited indirectly by a coupler via magnetic-field coupling is proposed in this paper, which can transform composite vibration energy into electric energy; The feasibility of the structure and principle of the harvester is proved through theoretical simulations and experiments, and it is found that the performance of the harvester can be adjusted by changing the structural parameters.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Physics, Multidisciplinary
Xiong Zhen-Yu, Cai Yuan-Wen, Wu Hao, Liu Tong, Liu Zheng-Liang, Ren Yuan
Summary: The evolution of the exciton polaron BEC system in the annular microcavity was studied, with a focus on the impact of microcavity size and pump beam configuration. Microcavity size directly affects the volume and power consumption of integrated devices, while different pump configurations also influence the system's evolution.
ACTA PHYSICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Simone Finizio, Claire Donnelly, Sina Mayr, Ales Hrabec, Jorg Raabe
Summary: In this paper, an experimental setup based on soft X-ray magnetic laminography is presented, which allows the imaging of magneto-dynamical processes in all three spatial dimensions and in time at arbitrary frequencies. Two resonant dynamical modes of a CoFeB microstructure, namely the fundamental vortex gyration mode and a magnetic field-induced domain wall excitation mode, are investigated using this setup. The imaging results show that the gyration dynamics of the vortex mode varies across the thickness of the core, coexisting with a breathing mode, while the domain walls in the microstructure exhibit uniform displacement across the thickness. This work highlights the possibility of investigating resonant magneto-dynamical processes using soft X-ray time-resolved laminography.
Article
Chemistry, Multidisciplinary
Mauricio Galvis, Fredy Mesa, Johans Restrepo
Summary: This work investigates the zero temperature hysteretic properties of iron quadrangular nanoprisms and the size conditions for the formation of magnetic vortex states. A field-driven magnetic phase diagram is proposed based on different aspect ratios and free boundary conditions, where vortex states are found to be stable along the hysteresis loops. Micromagnetic simulations and topological charge calculations are used to validate the results.
Article
Chemistry, Multidisciplinary
Run-Wu Zhang, Xiaodong Zhou, Zeying Zhang, Da-Shuai Ma, Zhi-Ming Yu, Wanxiang Feng, Yugui Yao
Summary: A new quantum state, Weyl monoloop semi-half-metal, with a single loop at the Fermi level yielding 100% spin polarization and protected by mirror symmetry has been discovered. The rutile-type metal fluorides LiV2F6 exhibit fully spin-polarized ultraflat surface states and soft ferromagnetic property, making it a promising candidate for exploring topology and magnetism effects.
Review
Chemistry, Multidisciplinary
Jinseok Kim, Juwon Oh, Atsuhiro Osuka, Dongho Kim
Summary: Baird (anti)aromaticity is a description of excited-state (anti)aromaticity, indicating that the Huckel aromatic or antiaromatic molecules in the ground state are reversed in the excited states. Porphyrinoids have played a significant role in demonstrating aromaticity reversal in excited states, contributing to its conceptual development and application in novel functional organic materials. This review provides an overview of experimental verification of excited-state aromaticity reversal by porphyrinoids and recent progress on its conceptual application in novel functional molecules.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
Peter B. Karadakov, Muntadar A. . H. Al-Yassir
Summary: The aromaticity reversals between the ground and singlet states, as well as the triplet states, of naphthalene and anthracene are investigated in this study. The off-nucleus isotropic magnetic shielding distributions were calculated using CASSCF wave functions with GIAOs. The results show that the shielding distributions of aromatic and antiaromatic states in naphthalene resemble the combination of two benzene rings. In anthracene, the energy of the 1La state is lower than 1Lb, resulting in an aromatic S1 state and an antiaromatic S2 state. The lowest antiaromatic singlet state is found to be more antiaromatic than the respective T1 state in both molecules, indicating a difference in (anti)aromaticity between benzene, cyclobutadiene, cyclooctatetraene, and polycyclic aromatic hydrocarbons.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Physics, Applied
Myoung-Woo Yoo, Sang-Koog Kim
APPLIED PHYSICS EXPRESS
(2015)
Article
Physics, Applied
Bosung Kim, Myoung-Woo Yoo, Jehyun Lee, Sang-Koog Kim
JOURNAL OF APPLIED PHYSICS
(2015)
Article
Physics, Applied
Jaehak Yang, Myoung-Woo Yoo, Sang-Koog Kim
JOURNAL OF APPLIED PHYSICS
(2015)
Correction
Multidisciplinary Sciences
Sang-Koog Kim, Myoung-Woo Yoo, Jehyun Lee, Ha-Youn Lee, Jae-Hyeok Lee, Yuri Gaididei, Volodymyr P. Kravchuk, Denis D. Sheka
SCIENTIFIC REPORTS
(2015)
Article
Multidisciplinary Sciences
Sang-Koog Kim, Myoung-Woo Yoo, Jehyun Lee, Ha-Youn Lee, Jae-Hyeok Lee, Yuri Gaididei, Volodymyr P. Kravchuk, Denis D. Sheka
SCIENTIFIC REPORTS
(2015)
Article
Multidisciplinary Sciences
Sang-Koog Kim, Myoung-Woo Yoo, Jehyun Lee, Jae-Hyeok Lee, Min-Kwan Kim
SCIENTIFIC REPORTS
(2016)
Article
Multidisciplinary Sciences
Sang-Koog Kim, Hyeon-Kyu Park, Jaehak Yang, Junhoe Kim, Myoung-Woo Yoo
SCIENTIFIC REPORTS
(2018)
Article
Physics, Multidisciplinary
Thibaut Devolder, Damien Rontani, Sebastien Petit-Watelot, Karim Bouzehouane, Stephane Andrieu, Jeremy Letang, Myoung-Woo Yoo, Jean-Paul Adam, Claude Chappert, Stephanie Girod, Vincent Cros, Marc Sciamanna, Joo-Von Kim
PHYSICAL REVIEW LETTERS
(2019)
Article
Multidisciplinary Sciences
Myoung-Woo Yoo, Damien Rontani, Jeremy Letang, Sebastien Petit-Watelot, Thibaut Devolder, Marc Sciamanna, Karim Bouzehouane, Vincent Cros, Joo-Von Kim
NATURE COMMUNICATIONS
(2020)
Article
Physics, Applied
Myoung-Woo Yoo, Francesca Mineo, Joo-Von Kim
Summary: The analytical model proposed in this work explains the deformation-induced inertial dynamics of a magnetic vortex by promoting deformation amplitudes to dynamical variables in a collective-coordinate approach. This extended model describes complex transients, the variation of effective mass with velocity, and provides a quantitative description of the inertial dynamics leading up to vortex core reversal, akin to the Walker transition in domain wall dynamics. This work establishes a standard prescription for describing the inertial effects of topological magnetic solitons.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
S. J. Carreira, D. Sanchez-Manzano, M. -W. Yoo, K. Seurre, V. Rouco, A. Sander, J. Santamaria, A. Anane, J. E. Villegas
Summary: In this study, spin-pumping effects in bilayers of a soft metallic ferromagnet and high-temperature superconductor YBCO were investigated using wideband ferromagnetic resonance. The Gilbert damping in the ferromagnet dropped drastically across the normal-superconducting transition, with different behaviors observed depending on the interface morphology. The unique behavior was attributed to the quasiparticle density of states at the YBCO surface and the zero-gap nodes in the momentum space.
Article
Materials Science, Multidisciplinary
Jeremy Letang, Claudia de Melo, Charles Guillemard, Aymeric Vecchiola, Damien Rontani, Sebastien Petit-Watelot, Myoung-Woo Yoo, Thibaut Devolder, Karim Bouzehouane, Vincent Cros, Stephane Andrieu, Joo-Von Kim
Summary: This experimental study focuses on the vortex dynamics in magnetic nanocontacts based on pseudo spin valves comprising the Co2MnGe Heusler compound. By combining precise film growth and nanoindentation techniques, different types of spin-transfer induced dynamics related to different modes of the magnetic vortex configuration were observed, such as mode hopping, mode coexistence, and mode extinction, in addition to the usual gyration mode.
Article
Materials Science, Multidisciplinary
Jeremy Letang, Sebastien Petit-Watelot, Myoung-Woo Yoo, Thibaut Devolder, Karim Bouzehouane, Vincent Cros, Joo-Von Kim
Article
Materials Science, Multidisciplinary
Myoung-Woo Yoo, Vincent Cros, Joo-Von Kim
Article
Physics, Applied
Joo-Von Kim, Myoung-Woo Yoo
APPLIED PHYSICS LETTERS
(2017)
