The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Hideo Ohno - One of the best experts on this subject based on the ideXlab platform.
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a spin orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature Nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
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A spin–orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
Shunsuke Fukami - One of the best experts on this subject based on the ideXlab platform.
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a spin orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature Nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
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A spin–orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
Tetsuro Anekawa - One of the best experts on this subject based on the ideXlab platform.
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a spin orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature Nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
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A spin–orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
Chaoliang Zhang - One of the best experts on this subject based on the ideXlab platform.
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a spin orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature Nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
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A spin–orbit torque switching scheme with collinear magnetic easy axis and Current Configuration
Nature nanotechnology, 2016Co-Authors: Shunsuke Fukami, Tetsuro Anekawa, Chaoliang Zhang, Hideo OhnoAbstract:Spin-orbit torque, a torque brought about by in-plane Current via the spin-orbit interactions in heavy-metal/ferromagnet nanostructures, provides a new pathway to switch the magnetization direction. Although there are many recent studies, they all build on one of two structures that have the easy axis of a nanomagnet lying orthogonal to the Current, that is, along the z or y axes. Here, we present a new structure with the third geometry, that is, with the easy axis collinear with the Current (along the x axis). We fabricate a three-terminal device with a Ta/CoFeB/MgO-based stack and demonstrate the switching operation driven by the spin-orbit torque due to Ta with a negative spin Hall angle. Comparisons with different geometries highlight the previously unknown mechanisms of spin-orbit torque switching. Our work offers a new avenue for exploring the physics of spin-orbit torque switching and its application to spintronics devices.
Sanghoo Park - One of the best experts on this subject based on the ideXlab platform.
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magnetic field Configurations on thruster performance in accordance with ion beam characteristics in cylindrical hall thruster plasmas
Applied Physics Letters, 2017Co-Authors: Wonho Choe, Sanghoo ParkAbstract:Magnetic field Configuration is critical in Hall thrusters for achieving high performance, particularly in thrust, specific impulse, efficiency, etc. Ion beam features are also significantly influenced by magnetic field Configurations. In two typical magnetic field Configurations (i.e., co-Current and counter-Current Configurations) of a cylindrical Hall thruster, ion beam characteristics are compared in relation to multiply charged ions. Our study shows that the co-Current Configuration brings about high ion Current (or low electron Current), high ionization rate, and small plume angle that lead to high thruster performance.
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Effect of magnetic field Configuration on the multiply charged ion and plume characteristics in Hall thruster plasmas
Applied Physics Letters, 2015Co-Authors: Wonho Choe, Sanghoo Park, Jong Ho SeonAbstract:Multiply charged ions and plume characteristics in Hall thruster plasmas are investigated with regard to magnetic field Configuration. Differences in the plume shape and the fraction of ions with different charge states are demonstrated by the counter-Current and co-Current magnetic field Configurations, respectively. The significantly larger number of multiply charged and higher charge state ions including Xe4+ are observed in the co-Current Configuration than in the counter-Current Configuration. The large fraction of multiply charged ions and high ion Currents in this experiment may be related to the strong electron confinement, which is due to the strong magnetic mirror effect in the co-Current magnetic field Configuration.
