Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Takeshi Nishimatsu"'
Autor:
Byounghak Lee, Takeshi Nishimatsu, Kiyoshi Ishikawa, Inkook Jang, Yasuyuki Kayama, Dae Sin Kim, Anthony Payet, Alexander Schmidt
Publikováno v:
2018 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD).
A new dynamical space partitioning method is presented in a parallelized lattice kinetic Monte Carlo (kMC) simulator to overcome the loss of parallel efficiency found in other parallelized kMC simulators. The dynamical partitioning of the simulation
Autor:
Tomoaki Yamada, Kazuhisa Sato, Takeshi Nishimatsu, Yoshihiro Misaka, Takanori Kiguchi, Toyohiko J. Konno, Noritaka Usami
Publikováno v:
Key Engineering Materials. 582:19-22
Pb (Mg1/3Nb2/3)O3(PMN) thin films were prepared by metal organic decomposition (MOD) method. The effects of Pb content and annealing temperature on the crystallinity of PMN epitaxial thin films were investigated. The 10at% Pb-excess PMN film annealed
Publikováno v:
MRS Proceedings. 1543:39-42
The electrocaloric effect holds promise for possible application in refrigeration technologies. There is much interest in this subject and experimental studies have shown the possibility for creating materials with a modest sized electrocaloric respo
Publikováno v:
Materials Letters. 89:254-257
The perovskite crystal BaTiO3 is modeled using a first-principles based effective Hamiltonian and molecular dynamics simulations are performed to estimate the pyroelectric response. The electrocaloric temperature change, Δ T , is calculated for diff
We present a semi-empirical effective Hamiltonian to capture effects of disorder associated with Ba and Sr cations occupying $A$ sites in (Ba$_{x}$Sr$_{1-x}$)TiO$_3$ on its ferroelectric phase transition. Averaging between the parameters of first-pri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0c9b6af8fdd79e9c8d186176355dd23
http://arxiv.org/abs/1608.06433
http://arxiv.org/abs/1608.06433
Autor:
Takeshi Nishimatsu, Anna Grünebohm
We report modifications of the ferroelectric and electrocaloric properties of BaTiO$_3$ by defects. For this purpose, we have combined \textit{ab initio}-based molecular dynamics simulations with a simple model for defects. We find that different kin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b7146eb629baacdc31fbe4026fccb03
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=84963499824
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=84963499824
Publikováno v:
Pramana. 70:263-270
We determine the effects of film thickness, epitaxial strain and the nature of electrodes on ferroelectric phase transitions in ultrathin films of BaTiO3 using a first-principles effective Hamiltonian in classical molecular dynamics simulations. We p
Publikováno v:
Physical Review B
We use molecular dynamics simulations for a first principles-based effective Hamiltonian to calculate two important quantities characterizing the electrocaloric effect in BaTiO$_3$, the adiabatic temperature change $\Delta T$ and the isothermal entro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0abf4381c9ed4339419d5c6de0b718f9
Autor:
Rodion V. Belosludov, Masashi Kawasaki, Hiroshi Mizuseki, Tomoteru Fukumura, Palanichamy Murugan, Y. Kawazoe, Takeshi Nishimatsu
Publikováno v:
Measurement Science and Technology. 16:242-247
Suitable spintronic materials have been screened out using a combinatorial computational approach from 45 sets of TiO2 rutile doped with double impurities, Ti14M1M2O32 (M1, M2 = Cr, Mn, Fe, Co, Ni, Mo, Ru, W, Re and Os, M1 ≠ M2) on the basis of the
Autor:
Yoshiyuki Kawazoe, Tsuguo Fukuda, Masahiro Goto, Hiroki Sato, Hiroshi Mizuseki, Nobuhiko Sarukura, Alex Quema, Masahiro Sakai, Shingo Ono, Riadh El Ouenzerfi, Dirk Ehrentraut, Akira Yoshikawa, Noriaki Terakubo, Takeshi Nishimatsu
Publikováno v:
Journal of Applied Physics. 96:7655-7659
The design of fluoride-based optical devices for deep ultraviolet applications is discussed. Variations in the band-gap energy and band structure with respect to composition are investigated for Li(1-x)KxBa(1-y)MgyF3 perovskites. The band-gap energy,