The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Sean C Solomon - One of the best experts on this subject based on the ideXlab platform.
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consequences of a solid inner core on mercury s Spin Configuration
Icarus, 2016Co-Authors: S J Peale, Jeanluc Margot, S A Hauck, Sean C SolomonAbstract:Abstract The pressure torque by a liquid core that drove Mercury to the nominal Cassini state of rotation is dominated by the torque from the solid inner core. The gravitational torque exerted on Mercury’s mantle from an asymmetric solid inner core increases the equilibrium obliquity of the mantle Spin axis. Since the observed obliquity of the mantle must be compatible with the presence of a solid inner core, the moment of inertia inferred from the occupancy of the Cassini state must be reduced to compensate the torque from the inner core and bring Mercury’s Spin axis to the observed position. The unknown size and shape of the inner core means that the moment of inertia is more uncertain than previously inferred.
Rolf J. Haug - One of the best experts on this subject based on the ideXlab platform.
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Probing Spin Configurations in quantum dots
AIP Conference Proceedings, 2007Co-Authors: M.c. Rogge, C. Fühner, Rolf J. HaugAbstract:We study the magnetoconductance of lateral quantum dots in high magnetic fields. We use Spin blockade and Kondo effect to investigate the Spin Configuration and the Spin filling mechanism and find a dependence on the electron number of the quantum dot.
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Multiple transitions of the Spin Configuration in quantum dots
Physical review letters, 2006Co-Authors: M.c. Rogge, C. Fühner, Rolf J. HaugAbstract:Single electron tunneling is studied in a many electron quantum dot in high magnetic fields. For such a system multiple transitions of the Spin Configuration are theoretically predicted. With a combination of Spin blockade and Kondo effect we are able to detect five regions with different Spin Configurations. Transitions are induced with changing electron numbers.
Chih-huang Lai - One of the best experts on this subject based on the ideXlab platform.
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effect of interfacial Spin Configuration on y type Spin orbit torque switching in an antiferromagnetic heavy alloy ferromagnet bilayer
Applied Physics Letters, 2021Co-Authors: Chao-yao Yang, Yu-shen Yen, Po-chuan Chen, Jih-chao Chiu, San-ding Huang, Chih-hsiang Tseng, Chih-huang LaiAbstract:This work applied an anisotropic magneto-resistance effect for studying the Spin–orbit torque (SOT)-driven magnetization switching in an antiferromagnetic heavy alloy/ferromagnet, PtMn/Co bilayer, under y-type SOT geometry. The tailorable magneto-structural ordering of PtMn provides an additional dimension to study the interplay among SOT efficiency, the interfacial Spin Configuration, and the y-type SOT switching. The results reveal that the SOT efficiency of PtMn, effective field generated by current, can be enhanced via forming the L10 (antiferromagnetic) phase after annealing; however, the efficiency appears to be less sensitive to the interfacial Spin Configuration. On the other hand, the critical current for the y-type SOT switching is even strongly associated with the PtMn/Co interfacial Spin Configuration. The lowest (highest) critical current is yielded when Co is antiferromagnetically (ferromagnetically) coupled to PtMn through the exchange bias. Engineering the interfacial Spin Configuration may provide an effective strategy to promote the critical current for the SOT device.
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Effect of interfacial Spin Configuration on y-type Spin–orbit torque switching in an antiferromagnetic heavy alloy/ferromagnet bilayer
Applied Physics Letters, 2021Co-Authors: Chao-yao Yang, Yu-shen Yen, Po-chuan Chen, Jih-chao Chiu, San-ding Huang, Chih-hsiang Tseng, Chih-huang LaiAbstract:This work applied an anisotropic magneto-resistance effect for studying the Spin–orbit torque (SOT)-driven magnetization switching in an antiferromagnetic heavy alloy/ferromagnet, PtMn/Co bilayer, under y-type SOT geometry. The tailorable magneto-structural ordering of PtMn provides an additional dimension to study the interplay among SOT efficiency, the interfacial Spin Configuration, and the y-type SOT switching. The results reveal that the SOT efficiency of PtMn, effective field generated by current, can be enhanced via forming the L10 (antiferromagnetic) phase after annealing; however, the efficiency appears to be less sensitive to the interfacial Spin Configuration. On the other hand, the critical current for the y-type SOT switching is even strongly associated with the PtMn/Co interfacial Spin Configuration. The lowest (highest) critical current is yielded when Co is antiferromagnetically (ferromagnetically) coupled to PtMn through the exchange bias. Engineering the interfacial Spin Configuration may provide an effective strategy to promote the critical current for the SOT device.
T. Kaneyoshi - One of the best experts on this subject based on the ideXlab platform.
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Magnetic properties in a transverse Ising nanowire with an antiferromagnetic Spin Configuration at the surface
Phase Transitions, 2015Co-Authors: T. KaneyoshiAbstract:The phase diagrams and temperature dependences of magnetizations in a transverse Ising nanowire with an antiferromagnetic Spin Configuration at the surface are studied by the use of the effective-field theory with correlations. A number of characteristic features, such as the possibility of reentrant phenomena being free from disorder-induced frustration, are obtained for the magnetic properties in the system.
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A transverse Ising bilayer film with an antiferromagnetic Spin Configuration
International Journal of Modern Physics B, 2015Co-Authors: T. KaneyoshiAbstract:The phase diagrams and temperature dependences of magnetizations in a transverse Ising bilayer film with an antiferromagnetic Spin Configuration are studied by the uses of the effective-field theory (EFT) with correlations, in order to clarify whether the appearance of a compensation point is possible below the transition temperature in the system. From these investigations, we have found a lot of characteristic phenomena in these properties, when the value of an interlayer coupling takes a large value, such as the reentrant phenomenon free from the disorder-induced frustration and the novel types of magnetization curve with a compensation point.
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A quadrangular transverse Ising nanowire with an antiferromagnetic Spin Configuration
Physica E: Low-dimensional Systems and Nanostructures, 2015Co-Authors: T. KaneyoshiAbstract:Abstract The phase diagrams and the temperature dependences of magnetizations in a transverse Ising nanowire with an antiferromagnetic Spin Configuration are investigated by the use of the effective-field theory with correlations (EFT) and the core–shell concept. Many characteristic and unexpected behaviors are found for them, especially for thermal variation of total magnetization mT. The reentrant phenomenon induced by a transverse field in the core, the appearance of a compensation point, the non-monotonic variation with a compensation point, the reentrant phenomena with a compensation point and the existence of both a broad maximum and a compensation point have been found in the thermal variations of mT.
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Frustration in a transverse Ising nanoisland with an antiferromagnetic Spin Configuration
Physica B: Condensed Matter, 2015Co-Authors: T. KaneyoshiAbstract:The phase diagrams, saturation magnetizations and temperature dependences of magnetizations in a transverse Ising nanoisland with an antiferromagnetic Spin Configuration are studied by the uses of the effective-field theory with correlations (EFT) and the mean-field approximation (MFA), in order to clarify whether the MFA can be successfully applied to the theoretical discussions of naonoislands. From these investigations, we have found a lot of unexpected characteristic phenomena in these properties, when the value of an interlayer coupling takes a large value. We have also found that the applications of the MFA to the magnetic properties are extremely restricted for nanoislands, when the value of an interlayer coupling takes a large value, in contrast to a number of bulk studies.
Shigeki Nimori - One of the best experts on this subject based on the ideXlab platform.
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Memory effects in Heisenberg Spin glasses: Spontaneous restoration of the original Spin Configuration rather than preservation in a frozen state
Journal of Applied Physics, 2012Co-Authors: Hiroaki Mamiya, Shigeki NimoriAbstract:Universality of Spin Configuration restoration is studied in Heisenberg Spin glasses: a dilute magnetic semiconductor Cd55Mn45Te as well as a dilute magnetic alloy Cu97Mn3. Reversions of the relaxations of magnetization were observed in both systems undergoing positive/negative temperature cycling under a constant magnetic field. Because the magnetization mirrors evolution of the Spin Configuration, these reversions indicate that the Spin Configurations are spontaneously restored to the initially stabilized states when the temperature is returned to the original. Whereas such Spin restoration does not occur if the Spin glasses are simply frozen, it is possible in the alternative ghost domain scenario of the droplet picture. This finding thus provides fresh insight into the nature of glassy systems.
