The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Guoyu Yang - One of the best experts on this subject based on the ideXlab platform.
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combination of lacunary polyoxometalates and high nuclear transition metal clusters under hydrothermal conditions 3 structure and characterization of cu enme 2 2 cu enme 2 h2o 2 cu6 enme 2 b a siw9o34 2 4h2o
Inorganic Chemistry, 2007Co-Authors: Shoutian Zheng, Daqiang Yuan, Jie Zhang, Guoyu YangAbstract:A novel sandwich-type polyoxometalate incorporating a unique hybrid hexanuclear copper cluster, [Cu(enMe)(2)](2){[Cu(enMe)(2)(H2O)](2)[Cu-6(enMe)(2)(B-a-SiW9O34)(2)]}center dot 4H(2)O (1, enMe = 1,2-diaminopropane), has been hydrothermally synthesized and structurally characterized by the elemental analyses, IR spectroscopy, TG analysis, magnetic properties, and single-crystal X-ray diffraction analysis. Crystal data for 1 triclinic, P (1) over bar; a = 12.5105(2), b = 14.3710(2), c = 17.2687(2) A; alpha = 98.834(1), beta = 110.744(1), gamma = 104.711(1)degrees; V = 2704.57(7) A(3); rho = 3.646 g/cm(3); Z = 1. X-ray crystallographic study shows that the molecular structure of 1 contains 10 copper ions: Six of them form an unprecedented inorganic-organic hybrid Cu-6 cluster via edge-sharing combination of two CuO6 octahedra, two CuO5, and two CuO3N2 square pyramids and are encapsulfated between two {B-a-SiW9O34} units. Two of them form two [Cu(enMe)(2)(H2O)](2+) complexes and further attach to the two {B-a-SiW9O34} units via two Cu-OW bridges, acting as a decorated role. The remaining two form isolated [Cu(enMe)(2)](2+) complexes playing roles of charge-compensation and space-fillers. Magnetization Measurement reveals that the hexanuclear copper cluster exhibits overall ferromagnetic interactions.
Eiji Saitoh - One of the best experts on this subject based on the ideXlab platform.
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gyroscopic g factor of rare earth metals
Applied Physics Letters, 2017Co-Authors: Yudai Ogata, Hiroyuki Chudo, Masao Ono, Kazuya Harii, Mamoru Matsuo, Sadamichi Maekawa, Eiji SaitohAbstract:We develop the in situ Magnetization Measurement apparatus for observing the Barnett effect consisting of a fluxgate sensor, a high speed rotor with frequencies of up to 1.5 kHz, and a magnetic shield at room temperature. The effective magnetic field (Barnett field) in a sample arising from rotation magnetizes the sample and is proportional to the rotational frequency. The gyroscopic g factor, g ′, of rare earth metals, in particular, Gd, Tb, and Dy, was estimated to be 2.00 ± 0.08, 1.53 ± 0.17, and 1.15 ± 0.32, respectively, from the slopes of the rotation dependence of the Barnett field. This study provides a technique to determine the g ′ factor even in samples where the spectroscopic method may not be available.
I Felner - One of the best experts on this subject based on the ideXlab platform.
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an analysis of orthopyroxene from tsarev l5 meteorite using x ray diffraction Magnetization Measurement and mossbauer spectroscopy
Journal of Molecular Structure, 2018Co-Authors: A A Maksimova, A V Chukin, I Felner, R V Kamalov, M I OshtrakhAbstract:Abstract The bulk Tsarev L5 ordinary chondrite powdered matter and chemically extracted orthopyroxene powder were studied using X-ray diffraction, Magnetization Measurement and Mossbauer spectroscopy. The unit cell parameters for orthopyroxene in the bulk material and in the extracted powder were the same. Magnetization data also showed similar behavior. However, X-ray diffraction and Mossbauer spectroscopy revealed residual iron-bearing phases in the extracted powder such as Ca-rich clinopyroxene, chromite and hercynite which were observed in the bulk matter. Additionally, the minor ferrous and ferric components were found in the chemically extracted orthopyroxene powder.
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study of metallic fe ni co alloy and stony part isolated from seymchan meteorite using x ray diffraction Magnetization Measurement and mossbauer spectroscopy
Journal of Molecular Structure, 2018Co-Authors: M I Oshtrakh, A A Maksimova, A V Chukin, I Felner, M V Goryunov, E V Petrova, V I GrokhovskyAbstract:Abstract A detailed study of Fe-Ni-Co alloy and stony part extracted from Seymchan (main group pallasite) meteorite fragment using X-ray diffraction, Magnetization Measurements, and Mossbauer spectroscopy with a high velocity resolution was carried out. A complex phase composition in Fe-Ni-Co alloy was observed. The Mossbauer spectrum of this alloy was fitted using eight magnetic sextets which were related to α2-Fe(Ni, Co), α-Fe(Ni, Co) and γ-Fe(Ni, Co) phases. The stony part consists of the following iron-bearing phases: olivine, troilite, Ca-rich clinopyroxene, chromite and probably iron-magnesium chromite. Estimations of the Fe2+ partitioning between the M1 and M2 sites in olivine and Ca-rich clinopyroxene were based on X-ray diffraction and Mossbauer data. The distribution coefficients KD and the temperatures of Fe2+ and Mg2+ cations equilibrium distribution Teq in olivine were evaluated using X-ray diffraction data and Mossbauer parameters.
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Magnetization Measurement of a possible high temperature superconducting state in amorphous carbon doped with sulfur
Physical Review B, 2009Co-Authors: I Felner, Y KopelevichAbstract:Magnetization M(T,H) Measurements performed on thoroughly characterized commercial amorphous carbon powder doped with sulfur (AC-S), revealed the occurrence of an inhomogeneous superconductivity (SC) below T_c = 38 K. The constructed magnetic field-temperature (H-T) phase diagram resembles that of type-II superconductors. However, AC-S demonstrates a number of anomalies. In particular, we observed (1) a non-monotonic behavior of the lower critical field H_c1(T); (2) a pronounced positive curvature of the "upper critical field boundary" that we associated with the flux lattice melting line Hm(T); (3) a spontaneous ferromagnetic-like Magnetization M0 coexisting with SC. Based on the analysis of experimental results we propose a nonstandard SC state in AC-S.
Eric Beaugnon - One of the best experts on this subject based on the ideXlab platform.
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experimental platform for solidification and in situ Magnetization Measurement of undercooled melt under strong magnetic field
Review of Scientific Instruments, 2015Co-Authors: Jun Wang, Hongchao Kou, Eric BeaugnonAbstract:An experimental platform for solidification of undercooled melt and synchronous Measurement of Magnetization under strong magnetic field is reported. The facility can be used for in-situ Measurement of the Magnetization of the undercooled melts and to studying the non-equilibrium solidification from deeply undercooled metals and alloys in magnetic field. The key advantages of this apparatus are first, we can obtain large undercooling in high fields by glass fluxing technique in combination with cyclical superheating and supercooling method, which is comparable to the maximum undercooling obtained by traditional method without magnetic field. Second, we can have a controlled thermal history with linear heating and cooling speed with high accuracy. Third, the temperature and Magnetization Measurement system are fast and on-line, which is very suitable for the investigation of both the structure transitions in the liquid in a wide temperature range (overheated and undercooled state) and the solid state phase transformations.
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Evidence for the structure transition in a liquid Co-Sn alloy by in-situ Magnetization Measurement
Materials Letters, 2015Co-Authors: Jun Wang, Jinshan Li, Rui Hu, Hongchao Kou, Eric BeaugnonAbstract:The structure transition in liquid Co76Sn24 alloy has been studied by measuring the Magnetization of the metallic melt in high magnetic field. The Magnetization of the liquid alloy was in-situ measured in a wide temperature range from nearly 300 °C above the melting point (overheated state) to more than 250 °C below the melting point (supercooled state). A transition point at about 1255 °C is determined from the turning point of the inverse Magnetization curve of the liquids. This unique phenomenon is attributed to the structure transition inside the liquid which can be evidenced by the Magnetization variations of the liquids.
Tatsuya Kawae - One of the best experts on this subject based on the ideXlab platform.
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in situ Magnetization Measurement of superconducting transition in pdh0 82 and pdd0 79 prepared by low temperature absorption
Journal of the Physical Society of Japan, 2018Co-Authors: Yuji Inagaki, Si Wen, Yousuke Kawasaki, H Takata, Y Furukawa, Tatsuya KawaeAbstract:We studied the superconducting properties of Pd hydride and deuteride prepared by a low temperature absorption method using in situ Magnetization Measurements down to T = 0.5 K. The absorption was ...
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development of a low temperature insert for precise Magnetization Measurement below t 2 k with a superconducting quantum interference device magnetometer
Japanese Journal of Applied Physics, 2013Co-Authors: Yoshiaki Sato, Kazuyuki Matsubayashi, Yuji Inagaki, Shun Makiyama, Yasutaka Sakamoto, Tadahiko Hasuo, Tetsuya Fujiwara, Hiroyuki Suzuki, Yoshiya Uwatoko, Tatsuya KawaeAbstract:We have developed a 9-mm-diameter 3He insert for precise Magnetization Measurements below T = 2 K that is attachable to a commercial superconducting quantum interference device magnetometer. The insert is made from a thin-walled stainless steel pipe with an inner diameter of 6.2 mm, which determines the maximum sample size. 3He gas is condensed in the pipe, which is liquefied by 4He gas at T ~1.8 K generated by the magnetometer via the heat exchanger of a Cu vacuum jacket with an outer diameter of 8.6 mm soldered to the stainless steel pipe. The temperature of the insert is decreased to T ~0.5 K by evacuating liquid 3He using a rotary pump and then to T = 0.36 K with a sorption pump. From the diaMagnetization signal of a superconducting Al chip with a mass below 0.1 mg, the Magnetization resolution with the insert is confirmed to be less than 10-7 emu. To examine the performance of the insert, we measured the temperature dependence of the magnetic susceptibility and Magnetization for Pr0.6La0.4Ag2In down to T = 0.4 K.