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Johan Åkerman
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Journal Articles

Fundamentals and applications of the skyrmion Hall effect

Open Access
Sheng Yang, Yuelei Zhao, Xichao Zhang, Xiangjun Xing, Haifeng Du, Xiaoguang Li, Masahito Mochizuki, Xiaohong Xu, Johan Åkerman, Yan Zhou
Journal: Applied Physics Reviews
Appl. Phys. Rev. 11, 041335 (2024)
https://doi.org/10.1063/5.0218280
Published: December 2024
View articletitled, Fundamentals and applications of the skyrmion Hall effect
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Journal Articles

Spin-torque nano-oscillators and their applications

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Sheng Jiang, Linrong Yao, Shun Wang, Di Wang, Long Liu, Akash Kumar, Ahmad A. Awad, Artem Litvinenko, Martina Ahlberg, Roman Khymyn, Sunjae Chung, Guozhong Xing, Johan Åkerman
Journal: Applied Physics Reviews
Appl. Phys. Rev. 11, 041309 (2024)
https://doi.org/10.1063/5.0221877
Published: October 2024
View articletitled, Spin-torque nano-oscillators and their applications
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Journal Articles

The enhancement of low-temperature excitation of magnons via interlayer exchange coupling in perpendicularly magnetized [Co/Pd] multilayers

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Julia Kasiuk, Wen-Bin Wu, Janusz Przewoźnik, Czesław Kapusta, Ivan Svito, Thanh Huong Nguyen, Khanh Tung Do, Dang Thanh Tran, Hung Manh Do, Johan Åkerman, Thi Ngoc Anh Nguyen
Journal: Applied Physics Letters
Appl. Phys. Lett. 124, 192407 (2024)
https://doi.org/10.1063/5.0189741
Published: May 2024
View articletitled, The enhancement of low-temperature excitation of magnons via interlayer exchange coupling in perpendicularly magnetized [Co/Pd] multilayers
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Journal Articles

Antiferromagnetic droplet soliton driven by spin current

Open Access
Roman V. Ovcharov, Mohammad Hamdi, Boris A. Ivanov, Johan Åkerman, Roman S. Khymyn
Journal: Applied Physics Letters
Appl. Phys. Lett. 124, 172406 (2024)
https://doi.org/10.1063/5.0189712
Published: April 2024
View articletitled, Antiferromagnetic droplet soliton driven by spin current
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Includes: Supplementary data
Journal Articles

Global biasing using a hardware-based artificial Zeeman term in spinwave Ising machines

Open Access
Victor H. González, Artem Litvinenko, Roman Khymyn, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 124, 092409 (2024)
https://doi.org/10.1063/5.0185888
Published: February 2024
View articletitled, Global biasing using a hardware-based artificial Zeeman term in spinwave Ising machines
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Journal Articles

Phase noise analysis of mutually synchronized spin Hall nano-oscillators

Open Access
Artem Litvinenko, Akash Kumar, Mona Rajabali, Ahmad A. Awad, Roman Khymyn, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 122, 222401 (2023)
https://doi.org/10.1063/5.0152381
Published: May 2023
View articletitled, Phase noise analysis of mutually synchronized spin Hall nano-oscillators
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Journal Articles

Voltage control of frequency, effective damping, and threshold current in nano-constriction-based spin Hall nano-oscillators

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Victor H. González, Roman Khymyn, Himanshu Fulara, Ahmad A. Awad, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 121, 252404 (2022)
https://doi.org/10.1063/5.0128786
Published: December 2022
View articletitled, Voltage control of frequency, effective damping, and threshold current in nano-constriction-based spin Hall nano-oscillators
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Journal Articles

Optothermal control of spin Hall nano-oscillators

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Shreyas Muralidhar, Afshin Houshang, Ademir Alemán, Roman Khymyn, Ahmad A. Awad, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 120, 262401 (2022)
https://doi.org/10.1063/5.0086758
Published: June 2022
View articletitled, Optothermal control of spin Hall nano-oscillators
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Includes: Supplementary data
Journal Articles

Using the photoinduced L3 resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft x-ray sources

Open Access
Somnath Jana, Shreyas Muralidhar, Johan Åkerman, Christian Schüßler-Langeheine, Niko Pontius
Journal: Structural Dynamics
Struct. Dyn. 8, 044304 (2021)
https://doi.org/10.1063/4.0000108
Published: August 2021
View articletitled, Using the photoinduced L3 resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft x-ray sources
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Journal Articles

Ultrafast Ising Machines using spin torque nano-oscillators

Open Access
Dagur Ingi Albertsson, Mohammad Zahedinejad, Afshin Houshang, Roman Khymyn, Johan Åkerman, Ana Rusu
Journal: Applied Physics Letters
Appl. Phys. Lett. 118, 112404 (2021)
https://doi.org/10.1063/5.0041575
Published: March 2021
View articletitled, Ultrafast Ising Machines using spin torque nano-oscillators
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Journal Articles

Influence of interfacial magnetic ordering and field-cooling effect on perpendicular exchange bias and magnetoresistance in nanoporous IrMn/[Co/Pd] films

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Wen-Bin Wu, Julia Kasiuk, Thi Ngoc Anh Nguyen, Janusz Przewoźnik, Julia Fedotova, Czesław Kapusta, Olga Kupreeva, Serguei Lazarouk, Khanh Tung Do, Thanh Huong Nguyen, Hong Ky Vu, Hoai Linh Pham, Dinh Lam Vu, Johan Åkerman
Journal: Journal of Applied Physics
J. Appl. Phys. 127, 223904 (2020)
https://doi.org/10.1063/5.0006194
Published: June 2020
View articletitled, Influence of interfacial magnetic ordering and field-cooling effect on perpendicular exchange bias and magnetoresistance in nanoporous IrMn/[Co/Pd] films
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Journal Articles

Width dependent auto-oscillating properties of constriction based spin Hall nano-oscillators

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Ahmad A. Awad, Afshin Houshang, Mohammad Zahedinejad, Roman Khymyn, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 116, 232401 (2020)
https://doi.org/10.1063/5.0007254
Published: June 2020
View articletitled, Width dependent auto-oscillating properties of constriction based spin Hall nano-oscillators
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Journal Articles

Reduced spin torque nano-oscillator linewidth using He + irradiation

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Sheng Jiang, Roman Khymyn, Sunjae Chung, Tuan Quang Le, Liza Herrera Diez, Afshin Houshang, Mohammad Zahedinejad, Dafiné Ravelosona, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 116, 072403 (2020)
https://doi.org/10.1063/1.5137837
Published: February 2020
View articletitled, Reduced spin torque nano-oscillator linewidth using He + irradiation
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Includes: Supplementary data
Journal Articles

Ultra-fast logic devices using artificial “neurons” based on antiferromagnetic pulse generators

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Olga Sulymenko, Oleksandr Prokopenko, Ivan Lisenkov, Johan Åkerman, Vasyl Tyberkevych, Andrei N. Slavin, Roman Khymyn
Journal: Journal of Applied Physics
J. Appl. Phys. 124, 152115 (2018)
https://doi.org/10.1063/1.5042348
Published: September 2018
View articletitled, Ultra-fast logic devices using artificial “neurons” based on antiferromagnetic pulse generators
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Journal Articles

Improving the magnetodynamical properties of NiFe/Pt bilayers through Hf dusting

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Hamid Mazraati, Mohammad Zahedinejad, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 113, 092401 (2018)
https://doi.org/10.1063/1.5026232
Published: August 2018
View articletitled, Improving the magnetodynamical properties of NiFe/Pt bilayers through Hf dusting
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Journal Articles

Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation

Open Access
Sheng Jiang, Sunjae Chung, Liza Herrera Diez, Tuan Quang Le, Fredrik Magnusson, Dafiné Ravelosona, Johan Åkerman
Journal: AIP Advances
AIP Advances 8, 065309 (2018)
https://doi.org/10.1063/1.5024472
Published: June 2018
View articletitled, Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation
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Journal Articles

Microwave probe stations with three-dimensional control of the magnetic field to study high-frequency dynamics in nanoscale devices

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Seyed Amir Hossein Banuazizi, Johan Åkerman
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 89, 064701 (2018)
https://doi.org/10.1063/1.5032219
Published: June 2018
View articletitled, Microwave probe stations with three-dimensional control of the magnetic field to study high-frequency dynamics in nanoscale devices
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Journal Articles

Influence of MgO barrier quality on spin-transfer torque in magnetic tunnel junctions

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Dhananjay Tiwari, Raghav Sharma, O. G. Heinonen, Johan Åkerman, P. K. Muduli
Journal: Applied Physics Letters
Appl. Phys. Lett. 112, 022406 (2018)
https://doi.org/10.1063/1.5005893
Published: January 2018
View articletitled, Influence of MgO barrier quality on spin-transfer torque in magnetic tunnel junctions
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Journal Articles

Antidamping spin-orbit torques in epitaxial-Py(100)/β-Ta

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Dhananjay Tiwari, Nilamani Behera, Akash Kumar, Philipp Dürrenfeld, Sujeet Chaudhary, D. K. Pandya, Johan Åkerman, P. K. Muduli
Journal: Applied Physics Letters
Appl. Phys. Lett. 111, 232407 (2017)
https://doi.org/10.1063/1.5007202
Published: December 2017
View articletitled, Antidamping spin-orbit torques in epitaxial-Py(100)/β-Ta
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Journal Articles

Low operational current spin Hall nano-oscillators based on NiFe/W bilayers

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Hamid Mazraati, Sunjae Chung, Afshin Houshang, Mykola Dvornik, Luca Piazza, Fatjon Qejvanaj, Sheng Jiang, Tuan Q. Le, Jonas Weissenrieder, Johan Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 242402 (2016)
https://doi.org/10.1063/1.4971828
Published: December 2016
View articletitled, Low operational current spin Hall nano-oscillators based on NiFe/W bilayers
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