[1] Previous estimates of the geodetic and geologic slip rates of the 1500 km long Altyn Tagh fault bordering the northern edge of the Tibetan plateau vary by a factor of five. Proposed reasons for these discrepancies include poor GPS geometry, interpretative errors in terrace morphology, and changes in fault slip rate over time. Here we present results from a new dense GPS array orthogonal to the fault at~86.2°E that indicates a velocity of 9.0 À3.2 / +4.4 mm/yr, in close agreement with geomorphologic estimates at the same location. Our estimated geodetic slip rate is consistent with recent geological slip rates based on terrace offsets. The resulting mean combined geological and geodetic slip rate (9.0 ± 4.0 mm/yr) is remarkably uniform for the central 800 km of the Altyn Tagh fault, significantly lower than early kinematic estimates and consistent with deformation elsewhere in Tibet and central Asia.

To design and fabricate rational surface architecture of individual particles is one of the key factors that affect their magnetic properties and microwave absorption capability, which is still a great challenge. Herein, a series of Co20Ni80 hierarchical structures with different surface morphologies, including flower-, urchin-, ball-, and chain-like morphologies, were obtained using structure-directing templates via a facile one-step solvothermal treatment. The microwave reflection loss (RL) of urchin-like Co20Ni80 hierarchical structures reaches as high as -33.5 dB at 3 GHz, with almost twice the RL intensity of the ball- and chain-like structures, and the absorption bandwidth (<-10 dB) is about 5.5 GHz for the flower-like morphology, indicating that the surface nanospikes and nanoflakes on the Co20Ni80 microsphere surfaces have great influences on their magnetic microwave absorption properties. Electron holography analysis reveals that the surface nanospikes and nanoflakes could generate a high density of stray magnetic flux lines and contribute a large saturation magnetization (105.62 emu g(-1) for urchin-like and 96.41 emu g(-1) for flower-like morphology), leading the urchin-like and flower-like Co20Ni80 to possess stronger microwave RL compared with the ball-like and chain-like Co20Ni80 alloys. The eddy-current absorption mechanism μ''(μ')(-2)(f)(-1) is dominant in the frequency region above 8 GHz, implying that eddy-current loss is a vital factor for microwave RL in the high frequency range. It can be supposed from our findings that different surface morphologies of magnetic hierarchical structures might become an effective path to achieve high-performance microwave absorption for electromagnetic shielding and stealth camouflage applications.

synthesis of L1 0 -FePt NPs has been recently reported, such as adding a third metal element (Au, Ag), which can reduce the ordering temperature to 400°C, but the fraction of the ordered phase is usually small. [9] Compared with the method of solution phase synthesis of fcc-FePt nanoparticles followed by high temperature annealing to get L1 0 -FePt nanoparticles, one step method attracts more attention. He and Zhao have developed a simple one step synthesis of L1 0 -FePt NPs by simultaneous decomposition of Fe(NO 3 ) 3 ·9H 2 O, H 2 PtCl 6 ·6H 2 O and direct catalytic graphitization of a carbon precursor (citric acid) at high temperature in solid phase, [10] but the size of the particles was ultrasmall (mostly 2~4 nm) even sintered at temperature of 850°C for 2 hours, therefore the coercivity was just 4.56kOe. More recently, Hu and co-workers reported a solvent-free chemical synthesis of L1 0 -FePt nanoparticles using the synthesized intermediate [Fe(H 2 O) 6 ]PtCl 6 as metal precursors, which was then mixed with different ratio of NaCl before sintering. [11] For the obtained FePt nanoparticles, which can obtain chemical ordered phase at annealing temperatures as low as 400 o C due to the intermediate precursor itself has a certain chemical order, the coercivity can be as large as 10.9 kOe. In a certain degree, this method has much improvement, but it still needs at least two steps.Here, we report a simple approach for large scale and direct synthesis of L1 0 -FePt NPs with tunable coercivity and controlling size. Unlike the previously reported method, no organic solvents, surfactant, chelating agent/catalyst or intermediate precursors are used, and the composition of Fe and Pt is easy to control, which is precursors (Fe(acac) 3 and Pt(acac) 2 ) in an alumina crucible with a heating rate of 5 °C/min under Ar flow. X-ray diffraction (XRD) characterization was carried out on a Bruker AXS D8-Advanced diffractometer with Cu Kα radiation (λ = 1.5418 Å).High-resolution TEM (HRTEM) and the high angle annular dark-field scanning TEM (HAADF-STEM) images were obtained on FEI Tecnai F20 200 kV TEM. The composition of the particles was semi-quantitatively determined by energy dispersive X-ray spectroscopy (EDS). Selection area electron diffraction (SAD) was used for structure characterization. Magnetic properties were measured using a Magnetic Property Measurement System (SQUID MPMS).The procedure of the synthesis L1 0 -FePt nanoparticles is shown in Figure 1. The design of our experiment is to let Fe and Pt atoms nucleate and grow into FePt nanoparticles on a substrate and then the substrate is removed and nanoparticles are colleted. Here, Fe(acac) 3 and Pt(acac) 2 (acac = acetylacetonate) were chosen as precursors of Fe and Pt. NaCl was selected as the substrate, which has a high melting point of 801 °C. NaCl is a perfect option since it is easy to be ground down to small size and also easy be removed with deionized water after synthesizing. For synthesizing L1 0 -FePt, NaCl particles can also work as insulation media pr...

Flexible magnetic devices are one of the indispensable flexible devices. However, the deformation of the magnetic devices will change the magnetic anisotropy of magnetic materials due to magnetoelastic anisotropy, which will decrease the performance of the devices. Therefore, it is essential to determine the stress-coefficient of magnetoelastic anisotropy in magnetic materials. Here, the magnetic anisotropy constants of an amorphous CoFeB film on a flexible polyvinylidene fluoride (PVDF) substrate in different stress states were quantitatively investigated by anisotropic magnetoresistance (AMR). The enhanced magnetic anisotropy of the CoFeB film at reduced temperature is due to magnetoelastic anisotropy induced by anisotropic thermal expansion of the PVDF substrate. Through fitting the AMR curves under variant fields in different stress states, the stress-coefficient of magnetoelastic anisotropy in the amorphous CoFeB film is obtained to be 170.7 × 103 erg cm−3 GPa−1.