367 citations · 2.7k across the 32 of their papers we have counts for
25 papers · 1 filter
Anomalous anisotropy of spin current in a cubic spin source with noncollinear antiferromagnetism
Cuimei Cao, Shiwei Chen, Rui-Chun Xiao +10
Cubic materials host high crystal symmetry and hence are not expected to support anisotropy in transport phenomena. In contrast to this common expectation, here we report an anomal…
Efficient field-free perpendicular magnetization switching by a magnetic spin Hall effect
Shuai Hu, Ding-Fu Shao, Huanglin Yang +6
Current induced spin-orbit torques driven by the conventional spin Hall effect are widely used to manipulate the magnetization. This approach, however, is nondeterministic and inef…
Angular characterization of spin-orbit torque and thermoelectric effects
Huanglin Yang, Huanjian Chen, Meng Tang +2
Arising from the interplay between charge, spin and orbital of electrons, spin-orbit torque (SOT) has attracted immense interest in the past decade. Despite vast progress, the exis…
Long spin coherence length and bulk-like spin-orbit torque in ferrimagnetic multilayers
Jiawei Yu, Do Bang, Rahul Mishra +14
Ferromagnetic spintronics has been a main focus as it offers non-volatile memory and logic applications through current-induced spin-transfer torques. Enabling wider applications o…
Oscillatory spin-orbit torque switching induced by field-like torques
Jong Min Lee, Jae Hyun Kwon, Rajagopalan Ramaswamy +7
Deterministic magnetization switching using spin-orbit torque (SOT) has recently emerged as an efficient means to electrically control the magnetic state of ultrathin magnets. The…
Experimental study of extrinsic spin Hall effect in CuPt alloy
Rajagopalan Ramaswamy, Yi Wang, Mehrdad Elyasi +4
We have experimentally studied the effects on the spin Hall angle due to systematic addition of Pt into the light metal Cu. We perform spin torque ferromagnetic resonance measureme…
Anomalous current-induced spin torques in ferrimagnets near compensation
Rahul Mishra, Jiawei Yu, Xuepeng Qiu +3
While current-induced spin-orbit torques (SOTs) have been extensively studied in ferromagnets and antiferromagnets, ferrimagnets have been less studied. Here we report the presence…
Continuous Tuning the Magnitude and Direction of Spin-Orbit Torque Using Bilayer Heavy Metals
Pan He, Xuepeng Qiu, Vanessa L. Zhang +3
Spin-orbit torques (SOTs) have opened a new path to switch the magnetization in perpendicularly magnetized films and are of great interest due to their potential applications in no…
Spin orbit torques and Dzyaloshinskii-Moriya interaction in dual-interfaced Co-Ni multilayers
Jiawei Yu, Xuepeng Qiu, Yang Wu +5
We study the spin orbit torque (SOT) and Dzyaloshinskii-Moriya interaction (DMI) in the dual-interfaced Co-Ni perpendicular multilayers. Through the combination of top and bottom l…
High performance THz emitters based on ferromagnetic/nonmagnetic heterostructures
Yang Wu, Mehrdad Elyasi, Xuepeng Qiu +4
We report a THz emitter with excellent performances based on nonmagnetic (NM) and ferromagnetic (FM) heterostructures. The spin currents are first excited by the femtosecond laser…
Enhanced spin-orbit torque via modulation of spin current absorption
Xuepeng Qiu, William Legrand, Pan He +5
The magnitude of spin-orbit torque (SOT), exerted to a ferromagnet (FM) from an adjacent heavy metal (HM), strongly depends on the amount of spin currents absorbed in the FM. We ex…
Flexible MgO barrier magnetic tunnel junctions
Li Ming Loong, Wonho Lee, Xuepeng Qiu +5
Flexible electronic devices require the integration of multiple crucial components on soft substrates to achieve their functions. In particular, memory devices are the fundamental…
Spin-orbit torque engineering via oxygen manipulation
Xuepeng Qiu, Kulothungasagaran Narayanapillai, Yang Wu +7
Spin transfer torques allow the electrical manipulation of the magnetization at room temperature, which is desirable in spintronic devices such as spin transfer torque memories. Wh…
In-plane angular dependence of the spin-wave nonreciprocity of an ultrathin film with Dzyaloshinskii-Moriya interaction
Vanessa Li Zhang, Kai Di, Hock Siah Lim +6
The nonreciprocal propagation of spin waves in an ultrathin Pt/Co/Ni film has been measured by Brillouin light scattering. The frequency nonreciprocity, due to the interfacial Dzya…
Determination of intrinsic spin Hall angle in Pt
Yi Wang, Praveen Deorani, Xuepeng Qiu +2
The spin Hall angle in Pt is evaluated in Pt/NiFe bilayers by spin torque ferromagnetic resonance (ST-FMR) measurements, and is found to increase with increasing the NiFe thickness…
Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures
Kulothungasagaran Narayanapillai, Kalon Gopinadhan, Xuepeng Qiu +4
We demonstrate a current tunable Rashba spin orbit interaction in LaAlO3/SrTiO3 (LAO/STO) quasi two dimensional electron gas (2DEG) system. Anisotropic magnetoresistance (AMR) meas…
Strain-enhanced tunneling magnetoresistance in MgO magnetic tunnel junctions
Li Ming Loong, Xuepeng Qiu, Zhi Peng Neo +5
While the effects of lattice mismatch-induced strain, mechanical strain, as well as the intrinsic strain of thin films are sometimes detrimental, resulting in mechanical deformatio…
Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film
Kai Di, Vanessa Li Zhang, Hock Siah Lim +6
The interfacial Dzyaloshinskii-Moriya interaction (DMI) in an in-plane anisotropic Pt(4nm)/Co(1.6nm)/Ni(1.6nm) film has been directly observed by Brillouin spectroscopy. It is mani…
Thermally assisted domain wall nucleation in perpendicular anisotropy trilayer nanowires
Kulothungasagaran Narayanapillai, Xuepeng Qiu, Jan Rhensius +1
We study thermally assisted domain wall generation in perpendicular magnetic anisotropy CoFeB trilayer nanowires by the effect of Joule heating. The anomalous Hall effect is utiliz…
Angular and temperature dependence of current induced spin-orbit effective fields in Ta/CoFeB/MgO nanowires
Xuepeng Qiu, Praveen Deorani, Kulothungasagaran Narayanapillai +4
Current induced spin-orbit effective magnetic fields in metal/ferromagnet/oxide trilayers provide a new way to manipulate the magnetization, which is an alternative to the conventi…
Spin-orbit torques in Co/Pd multilayer nanowires
Mahdi Jamali, Kulothungasagaran Narayanapillai, Xuepeng Qiu +3
Current induced spin-orbit torques have been studied in ferromagnetic nanowires made of 20 nm thick Co/Pd multilayers with perpendicular magnetic anisotropy. Using Hall voltage and…
A new route to spin-orbit torque engineering via oxygen manipulation
Xuepeng Qiu, Kulothungasagaran Narayanapillai, Yang Wu +6
Spin transfer torques allow for electrical manipulation of magnetization at room temperature, which is utilized to build future electronic devices such as spin transfer torque memo…
Origin of the two-dimensional electron gas at LaAlO3/SrTiO3 interfaces: The role of oxygen vacancies and electronic reconstruction
Z. Q. Liu, C. J. Li, W. M. Lü +10
The relative importance of atomic defects and electron transfer in explaining conductivity at the crystalline LaAlO3/SrTiO3 interface has been a topic of debate. Metallic interface…
Disorder-free sputtering method on graphene
Xue Peng Qiu, Young Jun Shin, Jing Niu +5
Deposition of various materials onto graphene without causing any disorder is highly desirable for graphene applications. Especially, sputtering is a versatile technique to deposit…