175% tunnel magnetoresistance at room temperature and high thermal stability using Co2FeAl0.5Si0.5 full-Heusler alloy electrodes

2006 ◽  
Vol 89 (25) ◽  
pp. 252508 ◽  
Author(s):  
N. Tezuka ◽  
N. Ikeda ◽  
S. Sugimoto ◽  
K. Inomata
Keyword(s):  
Thermal Stability ◽  
Heusler Alloy ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Tunnel Magnetoresistance ◽  
Full Heusler

Large tunnel magnetoresistance at room temperature with a Co2FeAl full-Heusler alloy electrode

2005 ◽  
Vol 86 (23) ◽  
pp. 232503 ◽  
Author(s):  
S. Okamura ◽  
A. Miyazaki ◽  
S. Sugimoto ◽  
N. Tezuka ◽  
K. Inomata
Keyword(s):  
Heusler Alloy ◽  
Room Temperature ◽  
Alloy Electrode ◽  
Tunnel Magnetoresistance ◽  
Large Tunnel ◽  
Full Heusler

scholarly journals Effects of Substitution of Y with Yb and Ce on the Microstructures and Mechanical Properties of Mg88.5Zn5Y6.5

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Hongxin Liao ◽  
Taekyung Lee ◽  
Jiangfeng Song ◽  
Jonghyun Kim ◽  
Fusheng Pan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Long Period ◽  
Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg88.5Zn5Y6.5-XREX (RE = Yb and Ce, X = 0, 1.5, 3.0, and 4.5) (wt.%) alloys were investigated in the present study. Mg88.5Zn5Y6.5 is composed of three phases, namely, α-Mg, long-period stacking ordered (LPSO) phases, and intermetallic compounds. The content of the LPSO phases decreased with the addition of Ce and Yb, and no LPSO phases were detected in Mg88.5Zn5Y2.0Yb4.5. The alloys containing the LPSO phases possessed a stratified microstructure and exhibited excellent mechanical properties. Mg88.5Zn5Y5.0Ce1.5 exhibited the highest creep resistance and mechanical strength at both room temperature and 200 °C, owing to its suitable microstructure and high thermal stability. The yield strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature was 358 MPa. The ultimate tensile strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature and 200 °C was 453 MPa and 360 MPa, respectively.

scholarly journals ON/OFF Photostimulation of Isatin Bipyridyl Hydrazones: Photochemical and Spectral Study

Molecules ◽  
2019 ◽  
Vol 24 (14) ◽  
pp. 2668 ◽  
Author(s):  
Róbert Šandrik ◽  
Pavol Tisovský ◽  
Klaudia Csicsai ◽  
Jana Donovalová ◽  
Martin Gáplovský ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Spectral Study ◽  
Photochemical Reaction ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Light Stimulation ◽  
Fluoride Ions ◽  
Isomerization Process

Four novel isatin hydrazones containing bipyridyl fragments were synthesized as potential ON/OFF switches. Hydrazone Z-isomers exhibit high thermal stability. The characteristic photochemical reaction for all studied hydrazones is the Z–E isomerization in CHCl3. After irradiation of hydrazones 1 and 2 in dimethylformamide (DMF), the photoreaction products are tautomers. When using light with the appropriate wavelength, the photo-tautomerization reaction is reversible. In these conditions, studied hydrazones have ON/OFF switch properties. In the case of hydrazones 1 and 2, by alternating heat and light stimulation it is possible to control the isomerization process reversibly. In the presence of fluoride ions, NH hydrogen from the studied hydrazones is cleaved, and the corresponding anions are formed. The resulting anions of Z-isomers are changed to the corresponding E-isomer at room temperature.

Metal to semimetal transition and magnetic critical behavior at room temperature in the full Heusler alloy Fe2MnSi

2019 ◽  
Vol 52 (50) ◽  
pp. 505002 ◽  
Author(s):  
Shampa Guha ◽  
Sunil Kumar ◽  
Subhadeep Datta ◽  
Murli Kumar Manglam ◽  
Manoranjan Kar
Keyword(s):  
Critical Behavior ◽  
Heusler Alloy ◽  
Room Temperature ◽  
Full Heusler

scholarly journals Electrical Conductivity and Nyquist Plot of C4C1Im BF4 at Room Temperature by Impedance Spectroscopy

2020 ◽  
Vol 3 (1) ◽  
pp. 119
Author(s):  
Pablo Vallet ◽  
Juan José Parajó ◽  
Félix Sotuela ◽  
Angel Morcillo ◽  
María Villanueva ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electrical Conductivity ◽  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Vapour Pressure ◽  
Room Temperature ◽  
Nyquist Plot ◽  
High Thermal Stability ◽  
Wide Potential

Ionic liquids (ILs) represent a real alternative for electrochemical applications due to their remarkable characteristics, namely a very low vapour pressure, low flammability, high thermal stability, wide potential window and high ionic conductivity. In this work, Nyquist plot and impedance spectroscopy at room temperature is proposed as an alternative method to obtain the ionic conductivity for ionic liquids by using an Agilent HP 4284A RLC precision meter. For this propose, the IL 1-butyl-3-methylimidazolium tetrafluoroborate (C4C1Im BF4) was selected and results were compared with the previously obtained from the conductimeter CRISON GLP31.

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