Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Frantti, Johannes"'
Autor:
Frantti, Johannes, Fujioka, Yukari, Rouleau, Christopher, Steffen, Alexandra, Puretzky, Alexander, Lavrik, Nickolay, Ivanov, Ilia N., Meyer, Harry M.
Publikováno v:
J. Phys. Chem. C 2019 123,32,19970-19978
Ferromagnetic insulator thin films can convey information by spin waves, avoiding charge displacement and Eddy current losses. The sparsity of high-temperature insulating ferromagnetic materials hinders the development of spin wave based devices. Sto
Externí odkaz:
http://arxiv.org/abs/1906.10975
Autor:
Fujioka, Yukari, Frantti, Johannes, Rouleau, Christopher, Puretzky, Alexander, Gai, Zheng, Lavrik, Nickolay, Herklotz, Andreas, Ivanov, Ilia N., Meyer, Harry M.
Publikováno v:
Annalen der Physik 2019
Insulating uniaxial room-temperature ferromagnets are a prerequisite for commonplace spin wave-based devices, the obstacle in contemporary ferromagnets being the coupling of ferromagnetism with large conductivity. We show that the uniaxial $A^{1+2x}$
Externí odkaz:
http://arxiv.org/abs/1906.10974
Autor:
Fujioka, Yukari, Frantti, Johannes, Rouleau, Christopher, Puretzky, Alexander, Meyer, Harry M.
Single phase nickel-cobalt-titanate thin films with a formula A1+2xTi1-xO3, where A is Ni2+,Co2+ and -0.25
Externí odkaz:
http://arxiv.org/abs/1606.04256
Autor:
Frantti, Johannes, Fujioka, Yukari
Defects and defect models of solids are reviewed. A numerical method able to treat non-periodical solids possessing several simultaneous defect types is given for simulating scattering in nanosize clusters. The approach takes particle size, shape, an
Externí odkaz:
http://arxiv.org/abs/1410.8280
Forming a solid-solution of NiTiO3 and CoTiO3, two isostructural (ilmenite) and isosymmetrical (space group R-3) compounds, result in a single-phase compound with a remarkably low crystal symmetry. By neutron and X-ray synchrotron powder diffraction
Externí odkaz:
http://arxiv.org/abs/1405.6330
Autor:
Fujioka, Yukari, Frantti, Johannes
Ilmenite solid-solutions, (Ni1-xCox)TiO3 (0.05 < x < 0.8), were synthesized at ambient atmosphere through solid-state reaction and were studied by energy dispersive spectroscopy of X-rays, X-ray diffraction, and DC and AC magnetometry. Temperature de
Externí odkaz:
http://arxiv.org/abs/1111.6140
The origin of the very large piezoelectric response observed in the vicinity of the morphotropic phase boundary (MPB) in perovskite lead zirconate titanate and related systems has been under intensive studies. Polarization rotation ideas are frequent
Externí odkaz:
http://arxiv.org/abs/0810.2701
The phase transition behaviour of PbTiO3 and BaTiO3 under (111) epitaxial strain is investigated using density-functional theory calculations. From tensile strains of +0.015 to compressive strains of -0.015, PbTiO3 undergoes phase transitions from C2
Externí odkaz:
http://arxiv.org/abs/0806.0522
Autor:
Frantti, Johannes
The issues related to the structure refinement of Pb(ZrxTi1-x)O3 (PZT) solid solutions are discussed. Particular attention is paid on the modelling of the co-existing phases in the vicinity of the morphotropic phase boundary (MPB), where local symmet
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603133
Autor:
Frantti, Johannes
The two-phase (space groups $Cc$ and $Cm$) structural model recently proposed for the modeling of the neutron powder diffaction pattern collected on Pb(Zr$_x$Ti$_{1-x}$)O$_3$ (PZT) sample with $x\approx 0.52$ [R. Ranjan, A. K. Singh, Ragini, and D. P
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504432