Zobrazeno 1 - 10
of 42
pro vyhledávání: '"R. H. Colman"'
Autor:
Y. Kasahara, Y. Takeuchi, R. H. Zadik, Y. Takabayashi, R. H. Colman, R. D. McDonald, M. J. Rosseinsky, K. Prassides, Y. Iwasa
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)
Alkali-doped fullerides are superconductors but the impact of dimensionality and electron correlation remains unclear. Here, Kasaharaet al. report an upper critical field about 90 T, suggesting cooperative interplay between molecular electronic struc
Externí odkaz:
https://doaj.org/article/34c7e7d279a94657b80d2a1c70769111
Autor:
Denys Musiienko, Andrew Armstrong, Frans Nilsén, Petr Veřtát, Oleg Heczko, Peter Müllner, L. Straka, Michal Rameš, R. H. Colman, Jaroslav Čapek
Publikováno v:
Journal of Materials Research and Technology, Vol 14, Iss, Pp 1934-1944 (2021)
Low twinning stress (TS) is a prerequisite for magnetic shape memory functionality in ferromagnetic martensites. We compare Ni50Mn28Ga22 (nominal at.%) single crystals from four different producers to reveal the effect of crystal quality on the TS. N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a52939eda68bea36461e967aa3a301c3
https://doi.org/10.1016/j.jmrt.2021.07.081
https://doi.org/10.1016/j.jmrt.2021.07.081
Autor:
Caroline E. Knapp, Sanjayan Sathasivam, Claire J. Carmalt, Risto S. Laitinen, Raija Oilunkaniemi, Carlos Sotelo-Vazquez, Clara Sanchez-Perez, R. H. Colman
Publikováno v:
ACS Omega, Vol 5, Iss 26, Pp 15799-15804 (2020)
Transition metal chalcogenide thin films of the type FexZrSe2 have applications in electronic devices, but their use is limited by current synthetic techniques. Here, we demonstrate the synthesis a...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e189fd9ce6fe5fbf0aea04e39fb41ae7
https://doi.org/10.1021/acsomega.0c00413
https://doi.org/10.1021/acsomega.0c00413
Autor:
R. H. Colman, Peter Müllner, Ladislav Straka, Tomáš Kmječ, Andrew Armstrong, Oleg Heczko, Michal Rameš, Petr Veřtát, Frans Nilsén
Publikováno v:
Shape Memory and Superelasticity. 6:97-106
Here we report a systematic research on effects of Fe and Cu upon properties relevant for the magnetic shape memory effect of Ni–Mn–Ga ferromagnetic shape memory alloys. Fe and Cu were identified as elements with potential synergism to increase t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9125c41518d3addc971eb7f7e8b709e
https://doi.org/10.1007/s40830-020-00273-3
https://doi.org/10.1007/s40830-020-00273-3
Autor:
Kosmas Prassides, Martin Jansen, H. Esma Okur, Annette Sans, Yasuo Ohishi, Claudia Felser, R. H. Colman
Publikováno v:
Inorganic Chemistry. 59:1256-1264
Cs4O6 adopts two distinct crystal structures at ambient pressure. At temperatures below ∼200 K, its ground state structure is tetragonal, incorporating two symmetry-distinct dioxygen anions, diamagnetic peroxide, O22–, and paramagnetic superoxide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6b30f087e0d02f36129bed28c4fbb8d
https://doi.org/10.1021/acs.inorgchem.9b02974
https://doi.org/10.1021/acs.inorgchem.9b02974
Publikováno v:
'Acta Physica Polonica A ', vol: 137, pages: 750-752 (2020)
Low-temperature magnetic properties of Er2Zr2O7 were studied by magnetization measurements on a newly prepared single crystal. Simultaneously, powder neutron diffraction was employed to investigate its microscopic properties down to 0.3 K. Our low-te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ecf3c6c3dfece6280a5019b5b61c875
https://doi.org/10.12693/aphyspola.137.750
https://doi.org/10.12693/aphyspola.137.750
Autor:
H. Esma Okur, Claudia Felser, Annette Sans, R. H. Colman, Kosmas Prassides, Craig M. Brown, Martin Jansen, Winfried Kockelmann
Publikováno v:
Inorganic Chemistry. 58:14532-14541
Cs4O6 is a mixed-valence molecular oxide with a cubic structure, comprising valency-delocalized O24/3– units and with properties highly sensitive to cooling protocols. Here we use neutron powder di...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f08cf4b1a5f1073cdbcc54e8b165dca5
https://doi.org/10.1021/acs.inorgchem.9b02122
https://doi.org/10.1021/acs.inorgchem.9b02122
Rapid floating zone growth of Ni2MnGa single crystals exhibiting magnetic shape memory functionality
Autor:
Václav Holý, Petr Cejpek, R. H. Colman, Milan Dopita, Oleg Heczko, Ladislav Straka, Martin Veis
Publikováno v:
Journal of Alloys and Compounds. 775:533-541
To obtain a material exhibiting magnetically induced reorientation (MIR), one of the magnetic shape memory effects, a well-developed method for single crystal growth is crucial. A [ 100 ] oriented Ni2MnGa single crystal exhibiting MIR was successfull
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47968555fb1a41a1a6e47e5566ea121b
https://doi.org/10.1016/j.jallcom.2018.10.113
https://doi.org/10.1016/j.jallcom.2018.10.113
Autor:
R. H. Colman, Barbora Vondráčková, Jiří Volný, Elen Duverger-Nédellec, Klára Uhlířová, Karel Carva
Publikováno v:
Journal of Alloys and Compounds. 771:680-685
The effect of Cu substitution on the stability of the CuMnAs tetragonal phase was studied both experimentally and by ab initio calculations. Polycrystalline samples with various compositions Cu$_{1+x}$Mn$_{1-x}$As $(x = 0 - 0.5)$ were synthetized. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0253dc83ea60d2e6e81246b4bab2f57e
https://doi.org/10.1016/j.jallcom.2018.08.199
https://doi.org/10.1016/j.jallcom.2018.08.199
Publikováno v:
Metals; Volume 11; Issue 6; Pages: 850
Metals, Vol 11, Iss 850, p 850 (2021)
Metals, Vol 11, Iss 850, p 850 (2021)
Systematic doping by transition elements Fe, Co and Ni on each site of Ni2MnGa alloy reveal that in bulk material the increase in martensitic transformation temperature is usually accompanied by the decrease in ferromagnetic Curie temperature, and vi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2932eeeda736f5a80cb52f3dc79b5e4b