A5087364425- Magnetic properties of thin films
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Magneto-Optical Properties and Applications
- ZnO doping and properties
- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Theoretical and Computational Physics
- Advanced Condensed Matter Physics
- Magnetic Properties and Synthesis of Ferrites
- Advanced Memory and Neural Computing
- Magnetic Properties of Alloys
- Semiconductor materials and devices
- Ferroelectric and Piezoelectric Materials
- Metallic Glasses and Amorphous Alloys
- Heusler alloys: electronic and magnetic properties
- Copper Interconnects and Reliability
- Electronic and Structural Properties of Oxides
- Ferroelectric and Negative Capacitance Devices
- Characterization and Applications of Magnetic Nanoparticles
- Surface and Thin Film Phenomena
- Metal and Thin Film Mechanics
- Shape Memory Alloy Transformations
- MXene and MAX Phase Materials
Nanjing University
2016-2025
Collaborative Innovation Center of Advanced Microstructures
2016-2025
Spintronics Research Network of Japan
2025
Hefei University of Technology
2010-2024
University of Delaware
2001-2024
Northwestern Polytechnical University
2024
National Laboratory of Solid State Microstructures
2011-2022
Southeast University
2009-2022
Chinese Academy of Sciences
2018-2022
University of York
2021-2022
Abstract While the discovery of two-dimensional (2D) magnets opens door for fundamental physics and next-generation spintronics, it is technically challenging to achieve room-temperature ferromagnetic (FM) order in a way compatible with potential device applications. Here, we report growth properties single- few-layer CrTe 2 , van der Waals (vdW) material, on bilayer graphene by molecular beam epitaxy (MBE). Intrinsic ferromagnetism Curie temperature ( T C ) up 300 K, an atomic magnetic...
Self-consistent determination of the key parameters in spin-charge conversion via spin pumping–induced inverse Hall effect.
Since the exchange bias (EB) effect was discovered in Co/CoO core-shell nanoparticles, it has been extensively studied various ferromagnet (FM)/antiferromagnet (AFM) bilayers due to its crucial role spintronics devices. In this article, we review investigation of EB our research group. First, outline basic features EB, including effects constituent layer thickness, microstructure and magnetization FM layers, also discuss asymmetric reversal process wedged-FM/AFM bilayers. Secondly,...
We report the ferroelectricity and ferromagnetism coexistence in Fe-doped ${\text{BaTiO}}_{3}$. Our first-principles calculation based on density-functional theory predicted a magnetic moment of $3.05{\ensuremath{\mu}}_{B}$ per Fe atom when substitutes Ti ${\text{BaTiO}}_{3}$, ferromagnetic coupling among moments dopants by using $\text{LSDA}+U$ method. The theoretical prediction was confirmed experimentally. ${\text{BaTiO}}_{3}$ ceramics prepared solid-state-reaction method show...
We present a method to quantify the spin Hall angle (SHA) with pumping and microwave photoresistance measurements. With this we separate inverse effect (ISHE) from other unwanted effects for permalloy/Pt bilayers using out-of-plane excitation. Through measurements, in- precessing angles of magnetization are determined enabled exact determination injected pure current. This is demonstrated an almost perfect Lorentz line shape obtained ISHE signal frequency independent SHA value as predicted...
In this paper, core loss characteristics of stator permanent-magnet (PM) machines are analyzed and calculated, in which the unique dc-biased magnetic induction is taken into account. The flux density variation patterns some key points a doubly salient PM (DSPM) machine by two-dimensional time-stepping finite-element method. To calculate other minor hysteresis loops under dc bias, silicon steel sheet condition first tested simple test system based on traditional Epstein frame functional...
For spintronics application, which requires fast field switching, it is important to have a kind of soft magnetic material with large damping coefficient. Here, we present the studies Nd dopant-level-dependent coefficient Nd${}_{x}$-Py${}_{(1\ensuremath{-}x)}$ thin films (30 nm) in dilute region utilizing ferromagnetic resonance (FMR). With content increasing, film structure was found be changing from polycrystalline amorphous when around 3.4%. Meanwhile, magnetization decreases linearly....
Abstract We report on the experimental and theoretical studies of cooling field ( H FC ) temperature T dependent exchange bias (EB) in Fe x Au 1 − /Fe 19 Ni 81 spin glass (SG)/ferromagnet (FM) bilayers. When varies from 8% to 14% SG alloys, with increasing , a sign-changeable E together unimodal distribution coercivity C are observed. Significantly, magnitude reduces (increases) value negative (positive) region, resulting entire ∼ curve move leftwards upwards. In meanwhile, variation has...
For polycrystalline $\mathrm{NiFe}/\mathrm{FeMn}$ bilayers, we have observed and quantified the rotation of pinning direction in exchange bias training recovery effects. During consecutive hysteresis loops, strongly depends on magnetization reversal mechanism ferromagnet layer. The interfacial uncompensated magnetic moment antiferromagnetic grains may be irreversibly switched rotated when process layer is accompanied by domain wall motion rotation, respectively.
A series of Fe3O4 particle chains with an average diameter 150 nm and different lengths were synthesized by using the self-assembly method at reduced temperature in synthesizing magnetic fields. The influence field on properties magnetite was studied structural analyses, magnetometry measurement, ferromagnetic resonance. uniaxial anisotropy saturation (Hs), hysteresis loop, resonance observed to increase increasing field. magnetization g-factor found slightly demagnetizing fields factors...
Abstract The clear understanding of exchange interactions between magnetic ions in substituted BiFeO 3 is the prerequisite for comprehensive studies on properties. BiFe 0.5 Mn O films and /BiMnO superlattices have been fabricated by pulsed laser deposition (001) SrTiO substrates. Using piezoresponse force microscopy (PFM), ferroelectricity at room temperature has inferred from observation PFM hysteresis loops electrical writing ferroelectric domains both samples. Spin glass behavior observed...
Nanoscale Fe3O4 epitaxial thin film has been synthesized on MgO/GaAs(100) spintronic heterostructure, and studied with X-ray magnetic circular dichroism. We have observed a total moment (ml+s) of (3.32 ± 0.1)μB/f.u., retaining 83% the bulk value. Unquenched orbital (ml) (0.47 0.05)μB/f.u. confirmed by carefully applying sum rule. The results offer direct experimental evidence bulk-like large in nanoscale fully Fe3O4/MgO/GaAs(100) which is significant for spintronics applications.
The dc spin-to-charge conversions of tantalum (Ta) in $\mathrm{Ta}/\mathrm{C}{\mathrm{o}}_{40}\mathrm{F}{\mathrm{e}}_{40}{\mathrm{B}}_{20}$ bilayer structures are investigated utilizing spin pumping and inverse Hall effects (ISHE). From Ta thickness $({t}_{\mathrm{Ta}})$-dependent resistivity x-ray diffraction measurements, we found that films, below 30 nm thickness, $\ensuremath{\beta}$-phase dominated. damping enhancement shows a fast increase with ${t}_{\mathrm{Ta}}$ when...
A new type of spin-orbit magnetoresistance effect is observed in Cu/YIG with interface decorated nanosize Pt islands.
Chiral magnets have recently gained recognition as ideal hosts for topological spin textures, showing significant promise applications in next-generation spintronic devices. However, chiral are still scarce, and their transport properties been rarely explored. Here, a magnet, Cr1/3NbS2, has synthesized, its magnetic systematically investigated. A high magnetoresistance sensitivity of 52.5%/T is achieved, phase diagram helimagnetic (CHM), soliton lattice (CSL), forced ferromagnetic (FFM)...
Spin transport across an interface in energy-efficient spintronic devices, especially for spin–orbit torque applications, has sparked interest the spintronics community. Here, we employ a rare-earth metal spacer Dy to modify of Py-based heterostructure, with aim modulating spin dynamics system and thereby controlling torques. As thickness increases, it is found that saturation magnetization Py/Dy decreases eventually reaches plateau, suggesting induced magnetic moment aligns opposite Fe Ni...
The spin dynamic damping is crucial for applications in magnetic memory, sensors, and logical systems. Here, focusing on interfacial antiferromagnetic exchange coupling, the magneto-dynamics of Ni80Fe20(Py)/Fe50Mn50(FeMn) bilayers systematically investigated. When FeMn thickness exceeds 5 nm, an bias field appears, significantly increasing Py/FeMn bilayer to around 0.015. A Cu spacer introduced between Py layers, effect eliminated following a dramatic decrease damping. However, slight...
Fe/GaAs is a prototype system of spin injection at room temperature. The interfacial strain and oriented bonds are both considered the origin Fe in-plane uniaxial magnetic anisotropy (UMA), which remains decisive. Here, by x-ray circular dichroism (XMCD) vibrating sample magnetometer measurements, this study shows that in Fe/Cr(t)/GaAs structure, UMA originates from chemical bonding between GaAs substrate varying Cr thickness, t. drops as coverage increases, characterized decrease saturation...
Regulating magnetism of a metal-organic framework (MOF) is highly desirable in magnetoelectric devices. Single-crystalline MOFs [(CH3)2NH2]2[FeIIIFe2-xIICoxII(HCOO)9] (x = 0, 0.2, 0.3, 0.6) with an unprecedented (412·63)1(49·66)2 topology were synthesized. These exhibit distinct antiferromagnetism, and the Néel temperature (TN) changes from 32.8 to 29.0 K increasing x. After field cooling above TN 2 K, these demonstrate giant exchange bias (EB) featured by significant vertical simultaneous...
Spin transmission is critical for the functionality of logic circuits, magnetic random-access memories, and sensors. Rare earth (RE) metals, which are promising candidates tuning spin transmission, can form antiferromagnetically coupled interfaces with ferromagnetic layers. In this study, we investigate laser-induced ultrafast injection from permalloy (Py) into RE metal holmium (Ho), modulated by interfacial engineering varying external field strength. The interface between Py Ho confirmed...
Abstract The core-shell structural Fe 3 O 4 /ZnS nanocomposites with controllable shell thickness were well-fabricated via seed-mediate growth method. Structural and morphological characterizations reveal the direct deposition of crystalline II-VI compound semiconductor ZnS layer on particles. Spin dependent electrical transport is studied different a large magnetoresistance (MR) ratio observed under magnetic field 1.0 T at room temperature 100 K for compacted sample by nanocomposites, which...