Zobrazeno 1 - 10
of 366
pro vyhledávání: '"Johan Åkerman"'
Autor:
Artem Litvinenko, Roman Khymyn, Victor H. González, Roman Ovcharov, Ahmad A. Awad, Vasyl Tyberkevych, Andrei Slavin, Johan Åkerman
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-9 (2023)
Abstract Time-multiplexed Coherent Ising Machines (CIMs) have demonstrated promising results in rapidly solving large-scale combinatorial problems. However, CIMs remain relatively large and power-demanding. Here, we demonstrate a spinwave-based Ising
Externí odkaz:
https://doaj.org/article/98bfa61e70714df5b55d980976f5229b
Autor:
Martina Ahlberg, Sunjae Chung, Sheng Jiang, Andreas Frisk, Maha Khademi, Roman Khymyn, Ahmad A. Awad, Q. Tuan Le, Hamid Mazraati, Majid Mohseni, Markus Weigand, Iuliia Bykova, Felix Groß, Eberhard Goering, Gisela Schütz, Joachim Gräfe, Johan Åkerman
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
Magnetic droplets are a type of non-topological magnetic soliton, which are stabilised and sustained by spin-transfer torques for instance. Without this, they would collapse. Here Ahlberg et al show that by decreasing the applied magnetic field, drop
Externí odkaz:
https://doaj.org/article/93a1c37b9fe942febb4e776260602113
Autor:
Kacho Imtiyaz Ali Khan, Akash Kumar, Pankhuri Gupta, Ram Singh Yadav, Johan Åkerman, Pranaba Kishor Muduli
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)
Abstract Fe $$_3$$ 3 Sn $$_{2}$$ 2 is a topological kagome ferromagnet that possesses numerous Weyl points close to the Fermi energy, which can manifest various unique transport phenomena such as chiral anomaly, anomalous Hall effect, and giant magne
Externí odkaz:
https://doaj.org/article/361ec8b50b11428c8555b426806add36
Autor:
Khadijeh Ahmadi, Farzad Mahfouzi, Loghman Jamilpanah, Morteza Mohseni, Tobias Böttcher, Philipp Pirro, Nicholas Kioussis, Johan Åkerman, S. A. Seyyed Ebrahimi, Seyed Majid Mohseni
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract The interfacial Dzyaloshinskii-Moriya Interaction (iDMI) is an antisymmetric exchange interaction that is induced by the broken inversion symmetry at the interface of, e.g., a ferromagnet/heavy metal. Thus, the presence of iDMI is not expect
Externí odkaz:
https://doaj.org/article/fee85372c8334f86a62223e8f2e847f6
Autor:
Himanshu Fulara, Mohammad Zahedinejad, Roman Khymyn, Mykola Dvornik, Shunsuke Fukami, Shun Kanai, Hideo Ohno, Johan Åkerman
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)
Spin Hall nano-oscillators can be tuned via magnetic fields and the drive current, but individual oscillator control in large arrays remains a challenge. Here, the authors provide individual control of the threshold current and the auto-oscillation f
Externí odkaz:
https://doaj.org/article/0835d9c5c4984dd29abeaa0f1a58d037
Publikováno v:
Structural Dynamics, Vol 8, Iss 4, Pp 044304-044304-7 (2021)
We study the optical-pump induced ultrafast transient change of x-ray absorption at L3 absorption resonances of the transition metals Ni and Fe in the Fe0.5Ni0.5 alloy. We find the effect for both elements to occur simultaneously on a femtosecond tim
Externí odkaz:
https://doaj.org/article/4450d7d1f4f94ca093944f28a1400a6a
Autor:
Wenlong Cai, Akash Kumar, Ao Du, Kewen Shi, Rui Xiao, Kaihua Cao, Jialiang Yin, Johan Åkerman, Weisheng Zhao
Publikováno v:
IEEE Electron Device Letters. 44:861-864
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
Spin torque nano-oscillatiors promise novel microwave applications but the functioning relies on the spin current from additional ferromagnetic or metal layers. The authors here achieved in a single ferromagnetic layer sandwiched by nonmagnetic insul
Externí odkaz:
https://doaj.org/article/f67b6995f8f0427d922c1db2ea9f513a
Autor:
Johan Åkerman, Sunjae Chung
Publikováno v:
New Physics: Sae Mulli. 73:7-11
Autor:
Somnath Jana, Ronny Knut, Erna K. Delczeg-Czirjak, Rameez S. Malik, Robert Stefanuik, Joachim A. Terschlüsen, Raghuveer Chimata, Dibya Phuyal, M. Venkata Kamalakar, Serkan Akansel, Daniel Primetzhofer, Martina Ahlberg, Johan Söderström, Johan Åkerman, Peter Svedlindh, Olle Eriksson, Olof Karis
Publikováno v:
Physical Review B. 107