Article
Materials Science, Multidisciplinary
Tao Lin, Xueying Zhang, Nicolas Vernier, Xinran Wang, Enxuan Dong, Chao Chen, Jianteng Niu, Yiming Sun, Liu Yang, Wenhui Zheng, Dan Su, Na Lei, Weisheng Zhao
Summary: In this study, the evaluation of Dzyaloshinskii-Moriya interaction (DMI) in ferrimagnetic Pt/Co/Tb trilayers was conducted via domain wall (DW) motion in the creep and flow regimes. The study revealed the occurrence of flattened bubble shape in the creep regime and attributed it to vertical Bloch lines based on bubble morphology and DW anisotropy energy analysis.
Article
Chemistry, Physical
Dongfeng Zheng, Guo Tian, Yadong Wang, Wenda Yang, Luyong Zhang, Zoufei Chen, Zhen Fan, Deyang Chen, Zhipeng Hou, Xingsen Gao, Qiliang Li, Jun-Ming Liu
Summary: In this study, the controlled manipulation of conductive domain walls in epitaxial BiFeO3 thin films was demonstrated using piezoresponse force microscopy and conductive atomic force microscopy. It was also found that nanoscale domains surrounded by highly conductive circular charged domain walls can be created and erased through the application of local field using a conductive probe.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Multidisciplinary
Boris Seng, Daniel Schoenke, Javier Yeste, Robert M. Reeve, Nico Kerber, Daniel Lacour, Jean-Lois Bello, Nicolas Bergeard, Fabian Kammerbauer, Mona Bhukta, Tom Ferte, Christine Boeglin, Florin Radu, Radu Abrudan, Torsten Kachel, Stephane Mangin, Michel Hehn, Mathias Klaeui
Summary: Chiral spin structures in ferrimagnetic Ta/Ir/Fe/GdFeCo/Pt multilayers were studied using scanning electron microscopy with polarization analysis (SEMPA) as a function of temperature. GdFeCo ferrimagnet exhibited right-handed Neel-type domain wall (DW) spin textures over a large temperature range, indicating a negative Dzyaloshinskii-Moriya interaction from both the top Fe/Pt and Co/Pt interfaces. Measurements of the DW width and complementary magnetic characterization confirmed the relatively constant exchange stiffness with temperature, supporting theoretical predictions. Additionally, a pure Neel-type skyrmionium was identified through direct imaging, showing potential for application in next-generation spintronic devices due to the expected vanishing skyrmion Hall angle.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Shinya Ota, Pham Van Thach, Hiroyuki Awano, Akira Ando, Kentaro Toyoki, Yoshinori Kotani, Tetsuya Nakamura, Tomohiro Koyama, Daichi Chiba
Summary: The study reveals that the compensation temperature of ferrimagnetic Tb-Fe films on a flexible substrate is significantly affected by tensile strain, resulting in a reduction of magnetic moments of both Fe and Tb. Analyzed using molecular field theory, the changes in exchange coupling between Fe and Tb atoms are speculated to be the cause of this phenomenon.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
T. T. Liu, Y. Liu, Z. Jin, Z. P. Hou, D. Y. Chen, Z. Fan, M. Zeng, X. B. Lu, X. S. Gao, M. H. Qin, J-M Liu
Summary: This paper investigates the excitation and propagation of spin waves inside magnetic domain walls and proposes that the handedness of low-energy spin-wave excitations can be controlled by tuning the net angular momentum in a ferrimagnetic domain wall. The results suggest that ferrimagnetic walls can serve as filters for specific handedness of spin waves, with lower energy consumption and faster group velocities compared to spin waves inside the domain. The paper also reveals the current-induced spin-wave Doppler shift in the ferrimagnetic wall, which can be controlled by the net angular momentum.
Article
Multidisciplinary Sciences
Sonka Reimers, Dominik Kriegner, Olena Gomonay, Dina Carbone, Filip Krizek, Vit Novak, Richard P. Campion, Francesco Maccherozzi, Alexander Bjorling, Oliver J. Amin, Luke X. Barton, Stuart F. Poole, Khalid A. Omari, Jan Michalicka, Ondrej Man, Jairo Sinova, Tomas Jungwirth, Peter Wadley, Sarnjeet S. Dhesi, Kevin W. Edmonds
Summary: This study reveals that the antiferromagnetic (AF) domain structure in CuMnAs thin films is dominated by nanoscale structural twin defects, which play a crucial role in determining the location and orientation of AF domain walls. The results provide insights into the interplay of crystalline defects, strain, and magnetic ordering in AF materials, offering a route to optimize device performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Cristina Balan, Johannes W. van de Jagt, Aymen Fassatoui, Jose Pena Garcia, Vincent Jeudy, Andre Thiaville, Marlio Bonfim, Jan Vogel, Laurent Ranno, Dafine Ravelosona, Stefania Pizzini
Summary: This research illustrates the effect of He+ irradiation on the magnetization reversal and domain wall dynamics of Pt/Co/AlOx trilayers. It is found that irradiation significantly decreases the depinning field of domain walls, allowing them to reach higher velocities at lower magnetic fields. It is also observed that larger He+ fluences lead to the formation of stable magnetic skyrmions with smaller sizes, in agreement with theoretical models for ultrathin films with labyrinthine domains.
Article
Physics, Applied
Cristina Balan, Jose Pena Garcia, Aymen Fassatoui, Jan Vogel, Dayane de Souza Chaves, Marlio Bonfim, Jean-Pascal Rueff, Laurent Ranno, Stefania Pizzini
Summary: The manipulation of magnetism with a gate voltage can lead to energy-efficient spintronics devices and high-performance magnetic memories. Exploiting magnetoionic effects under micropatterned electrodes allows for local modification of magnetic properties in a nonvolatile and reversible manner. By tuning magnetic anisotropy, magnetization, and Dzyaloshinskii-Moriya interaction, the dynamics of nontrivial magnetic textures can be modified.
PHYSICAL REVIEW APPLIED
(2022)
Article
Metallurgy & Metallurgical Engineering
A. K. Zvezdin, Z. Gareeva, A. M. Trochina, K. A. Zvezdin
Summary: This study investigates the specific features of the dynamics of magnetic domain walls in a two-sublattice ferrimagnet with two compensation points, namely the angular momentum compensation temperature and the magnetization compensation temperature. Slonczewski-type equations for the dynamics of domain walls in the region of the angular momentum compensation temperature are obtained using the effective Lagrangian method. The calculations of the stationary and nonstationary dynamics of domain walls in ferrimagnets are performed in the presence of combined easy-axis and easy-plane anisotropy. It is found that the easy-plane magnetic anisotropy field results in a shift in the Walker field and a change in the characteristics of the unsteady motion of domain walls.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Physics, Applied
Yuushou Hirata, Kaoru Noda, Yoichi Shiota, Takahiro Moriyama, Teruo Ono
Summary: In the study of field-driven domain wall creep motion in ferrimagnetic Tb/CoFeB/MgO, it was found that the domain wall velocity increases with increasing CoFeB thickness. The characteristic velocity at which the domain wall moves when the energy barrier vanishes is a dominant contribution to the domain wall velocity, clarifying the ferrimagnetic domain wall dynamics in the creep regime.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Himalay Basumatary, J. Arout Chelvane, D. V. Sridhara Rao, A. Talapatra, J. Mohanty, Deepak Kumar, Vajinder Singh, S. Kamat, Rajeev Ranjan
Summary: This study investigated the magnetic behavior of Tb-Fe thin films with different thicknesses, revealing the presence of out-of-plane magnetic anisotropy in these films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Chen-Rui Zhao, Yun-Xin Wei, Ting-Ting Liu, Ming-Hui Qin
Summary: In this study, the dynamics of ferrimagnetic domain walls driven by a sinusoidal microwave magnetic field were investigated theoretically and numerically. It was found that the domain wall velocity can be modulated by tuning the field frequency, and the biaxial anisotropy and other parameters also have an impact on the domain wall velocity.
ACTA PHYSICA SINICA
(2023)
Article
Physics, Applied
K. S. Antipin, T. T. Gareev, N. Myasnikov, E. P. Nikolaeva, A. P. Pyatakov
Summary: The paper demonstrates the emergence of magnetic domains in an iron garnet film at room temperature under the influence of an external electric field, with the nucleation of magnetic domains occurring with 90 degrees domain walls at both positively and negatively biased tips. The experimental and theoretical studies reveal the mechanism of electric field generation of the 90 degrees magnetic domain and its dependence on the domain wall's chirality.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Luyong Zhang, Guo Tian, Wenda Yang, Dongfeng Zheng, Chuanjie Lin, Jianbiao Xian, Yihang Guo, Xingchen Zhang, Xiuqin Qiu, Lanping Zhang, Zhen Fan, Deyang Chen, Zhipeng Hou, Minghui Qin, Jun-Ming Liu, Xingsen Gao
Summary: The precise patterning of nanoscopic domain structures in as-grown epitaxial PbTiO3 films can be achieved by introducing an ultrathin pre-patterned doping layer. This doping layer can effectively reverse the interfacial built-in bias, allowing for the transfer of the nano-patterns into the ferroelectric film's domain structure.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Pao-Wen Shao, Heng-Jui Liu, Yuanwei Sun, Mei Wu, Ren-Ci Peng, Meng Wang, Fei Xue, Xiaoxing Cheng, Lei Su, Peng Gao, Pu Yu, Long-Qing Chen, Xiaoqing Pan, Yachin Ivry, Yi-Chun Chen, Ying-Hao Chu
Summary: The emergence of polar domain walls in centrosymmetric ferroelastics has been demonstrated through direct observation, allowing for potential applications in energy conversion and local piezoelectricity.
Article
Materials Science, Multidisciplinary
Blazej Anastaziak, Hubert Glowinski, Maciej Urbaniak, Lukasz Frackowiak, Feliks Stobiecki, Piotr Kuswik
Summary: In this study, the oxidation of Co/Ni bilayers was investigated to find that oxidation time can tune the magnetic properties, leading to an increase in PMA contribution, attributed to exchange bias coupling between the ferromagnetic and antiferromagnetic layers.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sylwia Kozdra, Margot Jacquet, Joanna Kargul, Karol Heclik, Adrianna Wojcik, Pawel Piotr Michalowski
Summary: Recent development in combined theoretical and experimental analysis methods offer an opportunity to investigate organometallic materials and predict structure-property relationships. The study utilizes the combination of SIMS mass spectrometry and DFT calculations to analyze the chemical stability and reactivity of [M-(TPY)(2)](2+) complexes with specific structures. Analysis of electron density, electrostatic potential visualization, and bond lengths and HOMO-LUMO energetic gap calculations confirm the differences in bond-breaking mechanisms depending on the metal atom. The combined DFT/SIMS approach successfully assesses the chemical stability and fragmentation pathways of TPY compounds.
Article
Chemistry, Physical
Justinas Jorudas, Pawel Prystawko, Artur Simukovic, Ramunas Aleksiejunas, Juras Mickevicius, Marcin Krysko, Pawel Piotr Michalowski, Irmantas Kasalynas
Summary: A quaternary lattice matched InAlGaN barrier layer with an indium content of 16.5 +/- 0.2% and thickness of 9 nm was developed for high electron mobility transistor structures. The properties of the layer were investigated, revealing the origin of the photoluminescence peak and confirming the electron gas density and mobility.
Article
Chemistry, Physical
Matthias Kocher, Mathias Rommel, Pawel Piotr Michalowski, Tobias Erlbacher
Summary: Ohmic contacts on p-doped 4H-SiC are crucial for power electronic devices, but the underlying contact formation mechanisms are not fully understood. TLM structures were used to investigate the formation mechanism, and SIMS analysis revealed a significant increase of surface near Al concentration at the Ti3SiC2-SiC interface. Numerical simulation confirmed that this additional surface near Al concentration is essential for ohmic contact formation.
Article
Chemistry, Physical
Margot Jacquet, Silvio Osella, Ersan Harputlu, Barbara Palys, Monika Kaczmarek, Ewa K. Nawrocka, Adam A. Rajkiewicz, Marcin Kalek, Pawel P. Michalowski, Bartosz Trzaskowski, C. Gokhan Unlu, Wojciech Lisowski, Marcin Pisarek, Krzysztof Kazimierczuk, Kasim Ocakoglu, Agnieszka Wieckowska, Joanna Kargul
Summary: The covalent attachment of metalorganic wires on electron-rich surfaces, fluorine-doped tin oxide and single-layer graphene, leads to the promotion of p-doping of the graphene and significantly enhanced photocurrent, demonstrating potential applications in various fields.
CHEMISTRY OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
A. K. Dhiman, R. Gieniusz, P. Gruszecki, J. Kisielewski, M. Matczak, Z. Kurant, I. Sveklo, U. Guzowska, M. Tekielak, F. Stobiecki, A. Maziewski
Summary: This study investigates the magnetic field-driven evolution of domain structures and magnetization hysteresis loops in (Ir/Co/Pt)(6) magnetic multilayers with interfacial Dzyaloshinskii-Moriya interaction (IDMI) using various experimental techniques. By quantitatively evaluating IDMI using Brillouin light scattering (BLS) spectroscopy, the influence of IDMI on the modulation of domains and magnetic field is revealed, providing a deeper understanding of the characteristics of the magnetic multilayers.
Article
Engineering, Multidisciplinary
Pawel Piotr Michalowski, Jonas Muller, Chiara Rossi, Alexander Burenkov, Eberhard Baer, Guilhem Larrieu, Peter Pichler
Summary: The development of non-planar structures such as arrays of nanowires poses a challenge for determining dopant concentration. Existing techniques for 3D structures lack sensitivity, while SIMS is designed for analyzing flat samples. This work overcomes the limitation of standard SIMS approaches by covering the nanowires with photoresist, creating a flat surface. High incident angle bombardment allows for reliable information about dopant distribution along the height of the nanowires to be obtained. The SIMS analysis can be performed on an array of 1000 x 1000 nanowires with a detection limit of about 5 x 10^16 atoms/cm3 and a reasonable signal-to-noise ratio of about 10 dB.
Review
Mathematics, Applied
Gabriel D. Chaves-O'Flynn, D. L. Stein
Summary: In this paper, the authors review the challenges associated with thermal activation in nanoscopic magnetic systems and discuss transitions between different magnetic structures. The findings have important implications for understanding the behavior of thermal activation in nanoscale magnetic systems.
PHYSICA D-NONLINEAR PHENOMENA
(2023)
Article
Physics, Applied
T. Zalewski, A. Maziewski, A. Stupakiewicz
Summary: We investigated the single-domain switching of magnetization in Co-doped iron garnet films using a femtosecond laser pulse and time-resolved magneto-optical imaging. By tuning the pump laser fluence, we observed picosecond magnetization dynamics in a single bubble domain with a diameter of a few micrometers. This could potentially enable cold photo-magnetic recording in magnetic bits approaching the nano-scale.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Sreedevi Janardhanan, Slawomir Mielcarek, Piotr Kuswik, Maciej Krawczyk, Aleksandra Trzaskowska
Summary: This study investigated the spin-wave and surface acoustic wave dynamics in a multilayer structure using Brillouin light scattering. The quantitative analysis and finite element method simulations were used to determine the system parameters.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Damiano Ricciarelli, Giovanni Mannino, Ioannis Deretzis, Gaetano Calogero, Giuseppe Fisicaro, Richard Daubriac, Fuccio Cristiano, Remi Demoulin, Pawel P. Michalowski, Pablo Acosta-Alba, Jean-Michel Hartmann, Sebastien Kerdiles, Antonino La Magna
Summary: Ultraviolet nanosecond laser annealing is a powerful tool for optimal heating and melting. The complexity of semiconductor integration schemes has increased the importance of this process. Reliable simulations of laser melting are necessary, especially for 3D nanostructured systems with various shapes and phases. In this study, the laser melting process of Si1-xGex alloys was simulated using a finite element method/phase field approach, highlighting the significance of reproducing the reflectivity of the material interface accurately.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Jan Kisielewski, Pawel Gruszecki, Maciej Krawczyk, Vitalii Zablotskii, Andrzej Maziewski
Summary: Investigated the formation of periodic magnetic domains caused by propagating spin waves in magnetic materials and discussed the significance of this phenomenon.
Article
Materials Science, Multidisciplinary
A. Frej, I Razdolski, A. Maziewski, A. Stupakiewicz
Summary: We analyze the nonlinear regime of photoinduced coherent magnetization dynamics in cobalt-doped yttrium iron garnet films experimentally and numerically. The spin subsystem shows a strongly nonlinear response and an increase in effective Gilbert damping under photomagnetic excitation with femtosecond laser pulses. The anharmonicity of the magnetic energy landscape is found to be the source of this nonlinearity. Numerical simulations and the Landau-Lifshitz-Gilbert equation confirm the key role of cubic symmetry in reaching the nonlinear spin precession regime. These findings contribute to the understanding of laser-induced nonlinear spin dynamics and the development of applied photomagnetism.
Article
Materials Science, Multidisciplinary
M. Kowacz, M. Matczak, M. Schmidt, F. Stobiecki, P. Kuswik
Summary: Interfaces in thin-film systems have a significant impact on magnetic properties. By controlling the ion energy, the modification efficiency of interfaces can be controlled, thereby tuning the perpendicular magnetic anisotropy of the system.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
C. Swindells, H. Glowinski, Y. Choi, D. Haskel, P. P. Michalowski, T. Hase, F. Stobiecki, P. Kuswik, D. Atkinson
Summary: The study focused on the damping and spin transport in spintronic multilayered systems, revealing that the thickness increase of a Cu or Au spacer layer between the ferromagnet and the Pt layer leads to a rapid decrease in Pt proximity-induced magnetism (PIM) and damping, with a relationship that depends on the spacer layer material. Inserting a Cu spacer layer within the Pt showed a measurable increase in damping, while inserting an Au layer had almost no effect.
