APL Materials

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Effect of grain size on superelasticity in Fe-Mn-Al-Ni shape memory alloy wire
APL Materials - Tập 1 Số 3 - 2013
Toshihiro Omori, M. Okano, Ryosuke Kainuma
Effects of grain size on superelastic properties in Fe-34Mn-15Al-7.5Ni alloy wires with a ⟨110⟩ fiber-texture were investigated by cyclic tensile tests. It was confirmed that the critical stress for induced martensitic transformation and the superelastic strain are functions of relative grain size d/D (d: mean grain diameter, D: wire diameter), and that the critical stress is proportional to (1–d/... hiện toàn bộ
Reduction of the thermal conductivity in free-standing silicon nano-membranes investigated by non-invasive Raman thermometry
APL Materials - Tập 2 Số 1 - 2014
Emigdio Chávez‐Ángel, J. S. Reparaz, Jordi Gomis‐Brescó, Markus R. Wagner, J. Cuffe, Bartłomiej Graczykowski, A. Shchepetov, Haochuan Jiang, Mika Prunnila, Jouni Ahopelto, F. Alzina, C. M. Sotomayor Torres
We report on the reduction of the thermal conductivity in ultra-thin suspended Si membranes with high crystalline quality. A series of membranes with thicknesses ranging from 9 nm to 1.5 μm was investigated using Raman thermometry, a novel contactless technique for thermal conductivity determination. A systematic decrease in the thermal conductivity was observed as reducing the thickness, which is... hiện toàn bộ
Possible experimental realization of a basic Z2 topological semimetal in GaGeTe
APL Materials - Tập 7 Số 12 - 2019
Erik Haubold, Alexander Fedorov, Florian Pielnhofer, I. P. Rusinov, Tatiana V. Menshchikova, Viola Düppel, Daniel Friedrich, Richard Weihrich, Arno Pfitzner, Alexander Zeugner, Anna Isaeva, S. Thirupathaiah, Yevhen Kushnirenko, E. D. L. Rienks, T. K. Kim, Е. В. Чулков, B. Büchner, С. В. Борисенко
We report experimental and theoretical evidence that GaGeTe is a basic Z2 topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the classic 3D topological insulator Bi2Se3, but important differences account for an unprecedented transport scenario in GaGeTe. High-resolu... hiện toàn bộ
Low temperature growth of epitaxial ferroelectric BaTiO3
APL Materials - Tập 9 Số 4 - Trang 041104 - 2021
Yeong Jae Shin, Juan Jiang, Yichen Jia, F. J. Walker, Charles Ahn
High-throughput screening of perovskite oxynitride and oxide materials for visible-light photocatalysis
APL Materials - Tập 6 Số 10 - 2018
Keisuke Sawada, Takahito Nakajima
We performed a high-throughput screening of 29 160 perovskite oxynitrides and oxides in order to discover novel photocatalysts for water splitting by visible light. Efficient high-throughput simulations with density functional theory were performed on the K computer, which is a massively parallel multi-core supercomputer in Japan. By applying the screening procedure to the entire set of compounds ... hiện toàn bộ
Reduced graphene oxide wrapped Cu2O supported on C3N4: An efficient visible light responsive semiconductor photocatalyst
APL Materials - Tập 3 Số 10 - 2015
Sundaram Ganesh Babu, R. Vinoth, P. Surya Narayana, Detlef W. Bahnemann, Bernaurdshaw Neppolian
Herein, Cu2O spheres were prepared and encapsulated with reduced graphene oxide (rGO). The Cu2O–rGO–C3N4 composite covered the whole solar spectrum with significant absorption intensity. rGO wrapped Cu2O loading caused a red shift in the absorption with respect to considering the absorption of bare C3N4. The photoluminescence study confirms that rGO exploited as an electron transport layer at the ... hiện toàn bộ
Work function and surface stability of tungsten-based thermionic electron emission cathodes
APL Materials - Tập 5 Số 11 - 2017
Ryan Jacobs, Dane Morgan, John H. Booske
Materials that exhibit a low work function and therefore easily emit electrons into vacuum form the basis of electronic devices used in applications ranging from satellite communications to thermionic energy conversion. W–Ba–O is the canonical materials system that functions as the thermionic electron emitter commercially used in a range of high-power electron devices. However, the work functions,... hiện toàn bộ
Basics and prospective of magnetic Heusler compounds
APL Materials - Tập 3 Số 4 - Trang 041518 - 2015
Claudia Felser, Lukas Wollmann, Stanislav Chadov, Gerhard H. Fecher, S. Parkin
Nanostructuring and coherency strain in multicomponent hard coatings
APL Materials - Tập 2 Số 11 - Trang 116104 - 2014
Rikard Forsén, I.C. Schramm, Per O. Å. Persson, Frank Mücklich, Magnus Odén, Naureen Ghafoor
Nanolabyrinthine ZrAlN thin films by self-organization of interwoven single-crystal cubic and hexagonal phases
APL Materials - Tập 1 Số 2 - 2013
Naureen Ghafoor, L.J.S. Johnson, Dmitri O. Klenov, Jelly Demeulemeester, P. Desjardins, I. Petrov, Lars Hultman, Magnus Odén
Self-organization on the nanometer scale is a trend in materials research. Thermodynamic driving forces may, for example, yield chessboard patterns in metal alloys [Y. Ni and A. G. Khachaturyan, Nature Mater. 8, 410–414 (2009)]10.1038/nmat2431 or nitrides [P. H. Mayrhofer, A. Hörling, L. Karlsson, J. Sjölén, T. Larsson, and C. Mitterer, Appl. Phys. Lett. 83, 2049 (2003)]10.1063/1.1608464 during sp... hiện toàn bộ
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