A5101901011- Magnetic properties of thin films
- Semiconductor materials and devices
- Magnetic Properties and Applications
- Metallic Glasses and Amorphous Alloys
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Intermetallics and Advanced Alloy Properties
- Semiconductor Lasers and Optical Devices
- Advanced Data Storage Technologies
- Semiconductor materials and interfaces
- Photonic and Optical Devices
- Theoretical and Computational Physics
- Advanced Thermoelectric Materials and Devices
- RFID technology advancements
- solar cell performance optimization
- Thermal Radiation and Cooling Technologies
- Solar Thermal and Photovoltaic Systems
- Photonic Crystals and Applications
- Thermal Expansion and Ionic Conductivity
- Electrochemical Analysis and Applications
- Advanced Memory and Neural Computing
- Thermal properties of materials
- Advanced Condensed Matter Physics
- Crystallography and Radiation Phenomena
- Industrial Engineering and Technologies
Zhejiang University of Technology
2023
TU Wien
2012-2023
Nanjing Tech University
2017
Michigan Technological University
2017
University of Vienna
2012
Nano Carbon (Poland)
2011
Chinese University of Hong Kong
2000-2002
Rite-Solutions (United States)
1999-2001
Wuyi University
2000
Wuyi University
2000
In the search for cheaper representatives of thermoelectric clathrates, we have investigated type-I clathrates Ba${}_{8}$Cu${}_{x}$Si${}_{46\ensuremath{-}x}$ ($3.6\ensuremath{\le}x\ensuremath{\le}7$, $x$ $=$ nominal Cu content) in a combined experimental and theoretical study. The polycrystalline samples are prepared either by melting, ball milling, hot pressing or melt spinning, hand techniques. Temperature-dependent electrical resistivity $\ensuremath{\rho}(T)$ Seebeck coefficient $S(T)$...
We studied anisotropic magnetoresistivity (AMR) and planar Hall effect of granular Ni-rich NiFe–SiO2 Fe–SiO2 films for various metallic volume fraction. Planar resistivity was found to be the same as (MR) difference between longitudinal transverse geometry. As fraction decreases, we that MR evolves from AMR domination in conduction region, through an intermediate region with mixed negative behavior, isotropic tunneling region. Plausible explanations this complicated evolution are discussed.
In this paper, Mn3Ga2 alloys with high saturation magnetization and Curie temperatures were prepared by levitation melting pure Mn Ga elements followed annealing. The effect of annealing temperature on phase structure magnetic properties was investigated means x-ray diffraction a vibrating sample magnetometer. A single alloy Mn3Ga2, which has tetragonal P4/mmm structure, obtained an 773 K time 24 h. hysteresis curve its easy axis for shows that the room coercivity are 4.18 kOe 50.81 emu/g,...
We have designed and fabricated dual spin valve heads with synthetically pinned layers. They excellent sensitivity. The read-back waveform has a small asymmetry that is also insensitive to the bias current. read gap length of 0.14 /spl mu/m write 0.2 mu/m. nominal magnetic trackwidth 0.5 0.8 were conventional inductive their pole geometry defined by focused ion beam (FIB) technology. achieved an areal read/write density as high 14.5 Gb/in/sup 2/ at data transfer rate 23/spl sim/24 MB/sec....
Nanostructured Ba-Cu-Si clathrate powders were synthesized by mechanical milling using different amounts of process control agent (PCA). We investigated systematically the effects PCA on phase constitution and crystallite size nanopowders X-ray diffraction (XRD) as well particle morphology scanning electron microscopy (SEM). The increases powder yield reducing agglomeration. No detectable reaction occurred between phase, thus composition is unchanged after milling. Compared to milled without...
We have successfully demonstrated recording at areal densities as high 14.5 Gb/in/sup 2/ data rates 195 Mbit/s (24.4 MB/s) and bit-aspect-ratios (BAR) 14, using merged inductive-write/spin-valve-read heads on low noise thin film disks. Recording a rate of 300 (37.5 has also been achieved the corresponding linear density 356 KBPI. Combining capabilities, feasibility capacity 15.6 GB per 3.5" platter rotating 5400 RPM, with average about 240 (30 MB/s), thus demonstrated,.
We have successfully demonstrated recording at areal densities as high 36 Gb/in/sup 2/ data rates 173 Mbits/s (21.6 MB/s) and a Bit-Aspect-Ratio (BAR) of 7.3, using merged inductive-write/spin-valve-read heads on low noise thin film disks. Recording rate 590 (73.8 has also been achieved the corresponding linear density 231 KBPI. Comparisons with previous demonstrations summarized.
A new tandem absorber coating for mid-high temperature solar collectors mainly consists of a stress buffer layer Cr2O3, an infrared reflective Ag, diffusion barrier silicon-based absorbing layer, including p-Si, μc-Si, nc-Si, α-Si, and anti-reflection SiO2 is designed. Plasma enhanced magnetron sputtering (PEMS) high chemical vapor deposition (HTCVD) are combined in one chamber to prepare this selective which expected be air-stable able operate at mid- temperatures (300-500 °C) also exhibit...
In this article, granular (NiFeCo)35Ag65 films having a nominal atomic ratio of Ni:Fe:Co=74:16:10, near the zero magnetostriction ternary alloy, were prepared by dc magnetron co-sputtering. Subsequent thermal annealing was performed in vacuum (<2×10−3 Pa) furnace for 1 h at various temperatures ranging from 250 to 500 °C. The crystalline structure and magnetic as-deposited annealed characterized Rutherford backscattering spectroscopy, x-ray diffraction, force microscopy, microscopy....
Sputter deposited FeRhN films with a B/sub s/ value of more than 20 kG were used as high moment flux enhancement layer in the write element order to achieve recording density 63.2 Gb/in/sup 2/. This was disposed between gap and upper portion top pole, which made Ni/sub 45/Fe/sub 55/ 16 kG. A 36 dB overwrite nonlinear transition shift less then -20 obtained at this density. finite model calculate longitudinal field gradient medium location. The results suggested significant increases both by...
The structure evolution of granular (NiFeCo)xAg(1-x) (x = 9-41 at%) films was characterized by x-ray photoelectron spectroscopy, Rutherford backscattering diffraction, atomic force microscopy and magnetic microscopy. giant magnetoresistance the measured as a function temperature between 20 300 K using conventional four-point probe dc technique in presence field up to 7.6 kOe. dependence magnetization hysteresis loops for were SQUID magnetometer. It found that optimum concentration annealing...
An analytic model is presented that describes current induced heating effects in giant magnetoresistive (GMR) heads. Unlike previous transmission line models, the includes temperature on measured GMR response of head addition to changes and resistance. The will decrease with part due negative thermal coefficient for GMR. predicts does not as much indicated by since signal enhanced change applied field.
The solid-state nanopore has been developed as a powerful biosensor to detect individual molecules and nanoparticles. operational principle of the technique was determine volume, concentration, zeta potential particles from electrical signals nanoparticles passing through pore. Here, gold nanorod samples were used measure dynamic translocation process though nano channel. Gold nanorods have high throughput in silicon nitride sensing because their positive charge characteristics. Meanwhile,...
Type-I clathrates have been considered as very promising thermoelectric (TE) materials thus attracting attention widely. Here we report new Ba 8 Cu x Si y Ge 46-x-y (4≤ ≤ 6.5, = 0 and 5.15 6.425, 2.05≤ 36.9), focusing on their phase purity TE properties. Our results show that samples prepared by arc melting followed annealing are multi-phases alloys. The composition of the clathrate is also inhomogeneous. This indicates kinetic factor dominates reaction forming during element-melting...
Magnetic field sensitivity of IrMn-based synthetically pinned dual spin valve structures was studied using quasi-static testing (QST). The synthetic structure demonstrated to have inherent advantages in terms high magnetic and robust low asymmetry against changing bias current elevated temperatures. In addition, the diamond like carbon coated devices demonstrate that there are no measurable changes either resistance or QST amplitude after 3 days annealing at 120/spl deg/C.
Truly unidirectional surface plasmon-polaritons (USPPs) were recently confirmed to exist in a magnetized semiconductor interfaced with an opaque isotropic medium its topologically nontrivial bandgap at terahertz frequencies. In this work, waves interface between gyroelectric material and for general case are theoretically investigated, the conditions existence of robust modes, which lie material, analytically derived. Additionally, visible regime, layered plasmonic-gyroelectric metamaterial...
The family of cubic noncentrosymmetric 3-4-3 compounds has become a fertile ground for the discovery novel correlated metallic and insulating phases. Here, we report synthesis new heavy fermion compound, Ce$_3$Bi$_4$Ni$_3$. It is an isoelectronic analog prototypical Kondo insulator Ce$_3$Bi$_4$Pt$_3$ recently discovered Weyl-Kondo semimetal Ce$_3$Bi$_4$Pd$_3$. In contrast to volume-preserving Pt-Pd substitution, structural chemical analyses reveal positive pressure effect in...