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Improvement of high-frequency properties of Co2FeSi Heusler films by ultrathin Ru underlayer

Chinese Physics B 2020年第4期29卷 379-384页

作者： Cuiling Wang Shouheng Zhang Shandong Li Honglei Du Guoxia Zhao Derang Cao College of Physics Center for Marine Observation and CommunicationQingdao UniversityQingdao 266071China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266510China School of Physics Shandong UniversityJinan 250100China

Heusler Co2FeSi films with a uniaxial magnetic anisotropy and high ferromagnetic resonance frequency fr were deposited by an oblique sputtering technique on Ru underlayers with various thicknesses tRufrom 0 nm to 5 *** is revealed that the Ru underlayers reduce the grain size of Co2FeSi,dramatically enhance the magnetic anisotropy field HK induced by the internal stress from 242 Oe(1 Oe=79.5775 A·m^-1)to 582 Oe with an increment ratio of 2.4,while a low damping coefficient *** result of damping implies that the continuous interface between Ru and Co2FeSi induces a large in-plane anisotropic field without introducing additional external *** a result,excellent high-frequency soft magnetic properties with fr up to 6.69 GHz are achieved.

关键词： oblique sputtering ferromagnetic resonance Ru underlayer Heusler thin film

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Unraveling the role of Ti3C2 MXene underlayer for enhanced photoelectrochemical water oxidation of hematite photoanodes

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Journal of Energy Chemistry 2021年第7期30卷 147-154,I0005页

作者： Haiyan Ji Shan Shao Guotao Yuan Cheng Lu Kun Feng Yujian Xia Xiaoxin Lv Jun Zhong Hui Xu Jiujun Deng School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123JiangsuChina Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013JiangsuChina

Hematite is regarded as a promising photoanode for photoelectrochemical(PEC) water ***,the charge recombination occurred at the interface of FTO/hematite strictly limits the PEC performance of ***,we reported a Ti3C2 MXene underlayer modified hematite(Ti-Fe2O3) photoanode via a simple drop-casting followed by hydrothermal and annealing *** to the bifunctional role of Ti3C2 MXene underlayer in improving the interfacial properties of FTO/hematite and providing Ti source for the construction of Fe2 TiO5/Fe2O3 heterostructure in hematite nanostructure,the bulk and interfacial charge transfer dynamics of hematite are significantly enhanced,and consequently enhancing the PEC *** with the pristine hematite,the as-prepared Ti-Fe2O3 photoanode shows an increased photocurrent density from 0.80 mA/cm^(2) to 1.30 mA/cm^(2) at 1.23 V ***,a further promoted PEC performance including a dramatically increased photocurrent density of 2.49 mA/cm^(2) at1.23 V *** and an obviously lowered onset potential is achieved for the Ti-Fe2O3 sample after the subsequent surface F-treatment and the loading of FeNiOOH *** results suggest that the introduction of Ti3C2 MXene underlayer is a facile but effective approach to improve the PEC water splitting activity of hematite.

关键词： Hematite Photoelectrochemical Water splitting Ti3C2 MXene underlayer

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Effects of underlayer materials and substrate temperatures on the structural and magnetic properties of Nd2Fe14B films

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Chinese Physics B 2004年第11期13卷 1969-1974页

作者：马云贵杨正 M.Matsumoto A.Morisako S.Takei ResearchInstituteofMagneticMaterials LanzhouUniversityLanzhou730000China DepartmentofInformationEngineering ShinshuUniversity4-17-1WakasatoNagano380-8553Japan

Thin films of Nd2Fe14B were fabricated on heated glass substrates by dc magnetron sputtering. Different material underlayers (Ta, Mo, or W) were used to examine the underlayer influence on the structural and magnetic properties of the NdFeB films. Deposited on a Ta buffer layer at 420 degrees C, the 300 nm thick NdFeB films were shown to be isotropic. But when the substrate temperature Ts was elevated to 520 degrees C, the Nd2Fe14B crystallites of (00l) plane were epitaxially grown on Ta (110) underlayer. In contrast, Mo (110) buffer layer could not induce any preferential orientation in NdFeB film irrespective of the substrate temperature or film thickness. The W buffer layer was found to be most effective for the nucleation of Nd2Fe14B crystallites with c-axis alignment perpendicular to the film plane when Tss=490 degrees C the magnetic layer became isotropic. The maximum coercivity obtained was about 995 kA/m for the 100nm film deposited on W underlayer at 490 degrees C. These variations were tentatively explained in terms of the lattice misfit between the underlayer and the magnetic layer, combined with the considerations of underlayer morphologies.

关键词： Nd2Fe14B film underlayer substrate temperature texture

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Model Study of Basin Soil Loss (BSL) in the Loess Plateau of China (Ⅰ)

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Science China Chemistry 1993年第8期36卷 888-896页

作者：王治华黄联捷 Remote Sensing Centre in Geology Ministry of Geology and Mineral Resources. Beijing 100083 Resources and Enuironment Information System National Laboratory Academia Sinica Beijing 100101 PRC Institute of Geophysics Academia Sinica Beijing 100101 PRC

According to the influence of underlayer factor upon the basin erosion and in the support of Geographic Information System (GIS) of Loess Plateau(LPIS), the Gushanchuan Basin is divided into several regions with different erosion intensity. Correlating them to the BSL quantity, the complete soil loss model is established. By using this model, the soil loss quantity of the whole basin as well as each erosion intensity region can be estimated.

关键词： underlayer complete soil loss model remote sensing data Geographic Informationh System——GIS relative erosion intensity.

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