Article
Physics, Multidisciplinary
Christos Thanos, Ioannis Panagiotopoulos
Summary: Micromagnetic simulations are used to study resonances and microwave assisted magnetic switching (MAS) in two-phase Co/CoPt nanowires. The nucleation, interfacial domain wall pinning, and propagation processes are well distinguished and play a role in the system. The coupling strength varies to cover different hysteresis curves. Interfacial resonances play an important role in MAS, allowing for optimal conditions with low MAS frequencies and dc applied fields while balancing low field usage and short reversal time.
Article
Physics, Applied
Ying Tao, Chao Sun, Wendi Li, Liu Yang, Fang Jin, Yajuan Hui, Huihui Li, Xiaoguang Wang, Kaifeng Dong
Summary: This paper reports the realization of field-free spin-orbit torque switching with high switching ratio in a L1(0)-FePt single layer. The use of a specific substrate allows for this achievement. It is found that the direction of the applied current is crucial for field-free switching, and this phenomenon is explained by symmetry breaking induced by tilted PMA. Additionally, the FePt single layer exhibits stable multi-state magnetic switching behavior and nonlinear synaptic characteristics under the field-free condition.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Satoshi Mizutani, Nobuaki Kikuchi, Masatoshi Hatayama, Takehito Shimatsu, Satoshi Okamoto
Summary: This study experimentally investigated the microwave-assisted magnetization switching behavior of Co/Pt nanodot arrays under various microwave field conditions. The experimental results were compared with the calculated effective energy barrier height of microwave-assisted magnetization switching and showed that all the behaviors can be explained by the effect of thermal activation. However, accurate experimental studies are needed for quantitative discussions.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Daria O. Ignatyeva, Pavel O. Kapralov, Kiran Horabail Prabhakara, Hiroki Yoshikawa, Arata Tsukamoto, Vladimir I. Belotelov
Summary: Experimental observations of magnetization switching in in-plane magnetized GdFeCo films using femtosecond laser pulses in the presence of a small magnetic field of about 40 mu T have been reported. The switching effect has a threshold in both the applied magnetic field and the light intensity.
Article
Nanoscience & Nanotechnology
Hee-Sung Han, Sooseok Lee, Soong-Geun Je, Myeonghwan Kang, Hye-Jin Ok, Namkyu Kim, Weilun Chao, Mi-Young Im, Ki-Suk Lee
Summary: This study directly observed the stochastic behavior in the switching process of Co/Pt disks using full-field soft X-ray microscopy, revealing a close relationship between the stochasticity of magnetization switching and disk size. The stochasticity initially decreases and then increases as the disk size enlarges, reflecting the complex interplay of thermal fluctuation variance and multilevel switching within individual disks.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Qizhong Zhao, Fanghua Tian, Tieyan Chang, Kaiyan Cao, Dingchen Wang, Yin Zhang, Chao Zhou, Xiaoqin Ke, Wenliang Zuo, Yu Wang, Sen Yang, Xiaoping Song
Summary: In this study, the magnetization reversal phenomenon in the Ni20Mn3B6 alloy was investigated at low applied fields, revealing two compensation temperatures. The first temperature is attributed to competition between Mn atoms at different positions, while the second arises from moment rotation to satisfy Zeeman energy. This phenomenon enables tunable switching of magnetization between positive and negative values, providing potential applications in spintronic devices and magnetic storage materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Shihan Gao, Runji Cai, Wanjie Xiong, Chudong Xu
Summary: This article investigates the influence of damping on helicity-independent all-optical switching (HI-AOS) through simulation using a semiclassical atomic spin dynamics model. The results show that smaller damping can affect the switching process and slow down the rate of magnetization dynamics. This study provides a theoretical foundation for exploring the optimization parameters of HI-AOS.
Article
Chemistry, Inorganic & Nuclear
Xiaoxuan Ma, Ning Yuan, Wanting Yang, Shuang Zhu, Chenfei Shi, Huan Song, Zhiqiang Sun, Baojuan Kang, Wei Ren, Shixun Cao
Summary: In this study, the field-tuning mechanisms of spill switching and spin reorientation (SR) transition in PrxEr1-xFeO3 crystals were investigated. It was found that the type and temperature region of SR transition can be tuned by introducing different ratios of Pr3+ doping. External field can also regulate the trigger temperature of spin switching in Pr0.3Er0.7FeO3 crystals.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Zhu Liu, Shoulu Yang, Zhongwei Wang, Ning Ji, Dan Li, Yiqiang Wu
Summary: The study proposes a bamboo-epoxy resin composite material with enhanced strength and stability through delignification of bamboo and resin impregnation. The investigation reveals that different delignification times have an impact on the performance of the bamboo-epoxy resin, with a significant increase in flexural strength and compressive strength after 8 hours of delignification.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Multidisciplinary Sciences
L. Aviles-Felix, L. Farcis, Z. Jin, L. Alvaro-Gomez, G. Li, K. T. Yamada, A. Kirilyuk, A. V. Kimel, Th. Rasing, B. Dieny, R. C. Sousa, I. L. Prejbeanu, L. D. Buda-Prejbeanu
Summary: This study uses atomistic spin simulations to investigate all-optical switching in multilayered structures. By calculating the thermal variation and magnetization dynamics, it explores the possibility of thermally-induced magnetization switching in Tb/Co multilayers under specific conditions.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Kyoul Han, Kyung Jae Lee, Sanghoon Lee, Xinyu Liu, M. Dobrowolska, Jacek K. Furdyna
Summary: We observed field-free spin-orbit-torque (SOT) switching of magnetization in a ferromagnetic semiconductor (Ga,Mn)As film with four-fold in-plane magnetic anisotropy. Magnetization switching between two orthogonal in-plane easy axes was demonstrated through planar Hall resistance measurements without a magnetic field. The chirality of the switching was consistent with SOT arising from spin polarization caused by Dresselhaus- and Rashba-type spin-orbit-induced effective magnetic fields in the (Ga,Mn)As film. The potential for developing a field-free SOT device was indicated by the consistent repeatability of the SOT magnetization switching between two states by applying sequential current pluses with alternating polarities.
Article
Chemistry, Physical
I-Hsuan Kao, Ryan Muzzio, Hantao Zhang, Menglin Zhu, Jacob Gobbo, Sean Yuan, Daniel Weber, Rahul Rao, Jiahan Li, James H. Edgar, Joshua E. Goldberger, Jiaqiang Yan, David G. Mandrus, Jinwoo Hwang, Ran Cheng, Jyoti Katoch, Simranjeet Singh
Summary: This paper demonstrates the experimental realization of field-free deterministic magnetic switching using the out-of-plane antidamping spin-orbit torque in the quantum material WTe2, and confirms this phenomenon through numerical simulations. This is of great importance for next-generation spintronic applications.
Article
Materials Science, Ceramics
Biswanath Bhoi, Mangesh S. Diware
Summary: This study demonstrates the growth of highly oriented YIG films on amorphous quartz substrates with excellent magnetic properties and structural characteristics. The formation of YIG with preferred orientation opens up significant opportunities for preparing textured or single crystal materials on amorphous substrates, which is important for integrated applications with semiconductor technology.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Tobias Dannegger, Marco Berritta, Karel Carva, Severin Selzer, Ulrike Ritzmann, Peter M. Oppeneer, Ulrich Nowak
Summary: This research explores the possibility of ultrafast, coherent all-optical magnetization switching in antiferromagnets using the inverse Faraday effect in CrPt, demonstrating a new method for controlling magnetization.
Article
Multidisciplinary Sciences
Fen Xue, Shy-Jay Lin, Mingyuan Song, William Hwang, Christoph Klewe, Chien-Min Lee, Emrah Turgut, Padraic Shafer, Arturas Vailionis, Yen-Lin Huang, Wilman Tsai, Xinyu Bao, Shan X. X. Wang
Summary: Xue et al. investigate 'type-x' spin-orbit torque switching in Platinum/Cobalt multilayers, demonstrating unique spin polarizations and field-free magnetization switching. The unconventional spin currents result from the strong orbital magnetic moment observed in the low-dimensional Co films. Their work provides additional pathways for electrical control of spintronic devices in pursuit of high-speed, high-density, and low-energy non-volatile memory.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Nobuaki Kikuchi, Hitoshi Osawa, Motohiro Suzuki, Osamu Kitakami
IEEE TRANSACTIONS ON MAGNETICS
(2018)
Article
Engineering, Electrical & Electronic
Parmanand Sharma, Satoshi Okamoto, Hiroo Tajiri, Kazuhisa Sato, Yan Zhang, Osamu Kitakami, Akihiro Makino
IEEE TRANSACTIONS ON MAGNETICS
(2018)
Article
Engineering, Electrical & Electronic
Y. Otaki, T. Kato, S. Okamoto, N. Kikuchi, D. Oshima, S. Iwata, O. Kitakami
IEEE TRANSACTIONS ON MAGNETICS
(2018)
Article
Materials Science, Multidisciplinary
Takahiro Yomogita, Satoshi Okamoto, Nobuaki Kikuchi, Osamu Kitakami, Hossein Sepehri-Amin, Tadakatsu Ohkubo, Kazuhiro Hono, Takahiro Akiya, Keiko Hioki, Atsushi Hattori
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2018)
Article
Physics, Applied
Toshiyuki Kodama, Yusaku Kusanagi, Satoshi Okamoto, Nobuaki Kikuchi, Osamu Kitakami, Satoshi Tomita, Nobuyoshi Hosoito, Hisao Yanagi
PHYSICAL REVIEW APPLIED
(2018)
Article
Materials Science, Multidisciplinary
Kazunori Miyazawa, Satoshi Okamoto, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono
Article
Physics, Applied
Nobuaki Kikuchi, Kyohei Shimada, Takehito Shimatsu, Satoshi Okamoto, Osamu Kitakami
JAPANESE JOURNAL OF APPLIED PHYSICS
(2018)
Article
Multidisciplinary Sciences
Hideo Kaiju, Takahiro Misawa, Taro Nagahama, Takashi Komine, Osamu Kitakami, Masaya Fujioka, Junji Nishii, Gang Xiao
SCIENTIFIC REPORTS
(2018)
Article
Materials Science, Multidisciplinary
Satoshi Okamoto, Kazunori Miyazawa, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Yukio Takada, Takashi Sato, Yuji Kaneko, Akira Kato
Article
Physics, Applied
Nobuaki Kikuchi, Katsunari Sato, Shun Kikuchi, Satoshi Okamoto, Takehito Shimatsu, Osamu Kitakami, Hitoshi Osawa, Motohiro Suzuki
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
Robin Msiska, Shusaku Honjo, Yuki Asai, Masashi Arita, Atsushi Tsurumaki-Fukuchi, Yasuo Takahashi, Norihisa Hoshino, Tomoyuki Akutagawa, Osamu Kitakami, Masaya Fujioka, Junji Nishii, Hideo Kaiju
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
N. Kikuchi, T. Yomogita, K. Sato, S. Okamoto, O. Kitakami, H. Osawa, M. Suzuki, K. Toyoki, Y. Kotani, T. Nakamura
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Nanoscience & Nanotechnology
Takahiro Yomogita, Nobuaki Kikuchi, Satoshi Okamoto, Osamu Kitakami, Hossein Sepehri-Amin, Tadakatsu Ohkubo, Kazuhiro Hono, Keiko Hioki, Atsushi Hattori
Article
Chemistry, Multidisciplinary
Nguyen Tat Trung, Mohammad Ikram Hossain, Md Iftekharul Alam, Atsushi Ando, Osamu Kitakami, Nobuaki Kikuchi, Tsuyoshi Takaoka, Yasuyuki Sainoo, Ryuichi Arafune, Tadahiro Komeda
Article
Materials Science, Multidisciplinary
Nobuaki Kikuchi, Katsunari Sato, Satoshi Okamoto, Osamu Kitakami, Takehito Shimatsu, Hirofumi Suto
Summary: This study theoretically investigates the effect of thermal activation in microwave-assisted switching (MAS) and applies an analytical method to examine MAS experiments on a specific magnetic material. The study reveals that thermal activation plays a crucial role in MAS and modifies the dependences of the switching field on the microwave frequency and amplitude. The results highlight the importance of thermal activation for optimizing MAS behavior in practical applications.