Zobrazeno 1 - 10 of 67 pro vyhledávání: '"Roger D. Johnson"'
1
Akademický článek
Spin-induced multiferroicity in the binary perovskite manganite Mn2O3
Autor: Junzhuang Cong, Kun Zhai, Yisheng Chai, Dashan Shang, Dmitry D. Khalyavin, Roger D. Johnson, Denis P. Kozlenko, Sergey E. Kichanov, Artem M. Abakumov, Alexander A. Tsirlin, Leonid Dubrovinsky, Xueli Xu, Zhigao Sheng, Sergey V. Ovsyannikov, Young Sun
Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
Multiferroic binary oxides with the perovskite structure have been very rare. Here, Cong et al. report magnetically-driven ferroelectricity and a large magnetoelectric effect in a binary perovskite compound Mn2O3 at low temperatures.
Externí odkaz: https://doaj.org/article/4208ca178e1940a0a74b54a0d2726731
Zobrazit plný text záznamu
5
Controlling Magnetic Anisotropy in a Zero-Dimensional S = 1 Magnet Using Isotropic Cation Substitution
Autor: Serena M. Birnbaum, Robert C. Williams, Samuel P. M. Curley, Melissa L. Rhodehouse, David Walker, Jamie L. Manson, John Singleton, Andrew Ozarowski, Danielle Y. Villa, A. M. Vibhakar, Roger D. Johnson, Paul Goddard
Publikováno v: Journal of the American Chemical Society
The [Zn1–xNix(HF2)(pyz)2]SbF6 (x = 0.2; pyz = pyrazine) solid solution exhibits a zero-field splitting (D) that is 22% larger [D = 16.2(2) K (11.3(2) cm–1)] than that observed in the x = 1 material [D = 13.3(1) K (9.2(1) cm–1)]. The substantial
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bc322e1c11d16520774a7cc6ee62a17
http://europepmc.org/articles/PMC8017523
Zobrazit plný text záznamu
6
The rich physics of A-site-ordered quadruple perovskite manganites AMn7O12
Autor: Alexei A. Belik, Roger D. Johnson, Dmitry D. Khalyavin
Publikováno v: Dalton Transactions. 50:15458-15472
Perovskite-structure AMnO3 manganites played an important role in the development of numerous physical concepts such as double exchange, small polarons, electron–phonon coupling, and Jahn–Teller effects, and they host a variety of important prope
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7fb98fc0272cd74a00f84542784a638d
https://doi.org/10.1039/d1dt02992d
Zobrazit plný text záznamu
7
A plethora of structural transitions, distortions and modulations in Cu-doped BiMn7O12 quadruple perovskites
Autor: Roger D. Johnson, Masahiko Tanaka, Dmitry D. Khalyavin, Yoshitaka Matsushita, Alexei A. Belik
Publikováno v: Journal of Materials Chemistry C. 9:10232-10242
The presence of strongly competing electronic instabilities in a crystalline material can produce fascinating structural phenomena. For example, the A-site-ordered quadruple perovskite BiMn7O12 hosts both active polar instabilities of the Bi3+ lone p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e523a7167acb3a3941f7f6a19dec523f
https://doi.org/10.1039/d1tc02344f
Zobrazit plný text záznamu
8
High-Pressure Synthesis, Crystal Structures, and Properties of A-Site Columnar-Ordered Quadruple Perovskites NaRMn2Ti4O12 with R = Sm, Eu, Gd, Dy, Ho, Y
Autor: Roger D. Johnson, Rebecca Scatena, Masahiko Tanaka, Kazunari Yamaura, Ran Liu, Yoshiyuki Inaguma, Alexei A. Belik, Dmitry D. Khalyavin, Yoshitaka Matsushita
Publikováno v: Inorganic Chemistry. 59:9065-9076
The formation of NaRMn2Ti4O12 compounds (R = rare earth) under high pressure (about 6 GPa) and high temperature (about 1750 K) conditions was studied. Such compounds with R = Sm, Eu, Gd, Dy, Ho, Y ...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2dc5ad0394f4033474f0a844b55ff1e5
https://doi.org/10.1021/acs.inorgchem.0c00938
Zobrazit plný text záznamu
9
Formate-mediated magnetic superexchange in the model hybrid perovskite [(CH3)2NH2]Cu(HCOO)3
Autor: Roger D. Johnson, Piero Macchi, Rebecca Scatena, Pascal Manuel
Publikováno v: Journal of Materials Chemistry C. 8:12840-12847
We have investigated the magnetic and electronic structures of crystalline dimethylammonium copper formate [(CH3)2NH2]Cu(HCOO)3, a model compound that belongs to a wide class of hybrid organic–inorganic perovskites. We present the results of a comb
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e2887f2bc8c45514b0c5ce6e51b63dd
https://doi.org/10.1039/d0tc03913f
Zobrazit plný text záznamu
10
Pressure-Induced Jahn-Teller Switch in the Homoleptic Hybrid Perovskite [(CH3)2NH2]Cu(HCOO)3: Orbital Reordering by Unconventional Degrees of Freedom
Autor: Roger D. Johnson, Piero Macchi, Rebecca Scatena, Michał Andrzejewski
Publikováno v: Journal of Materials Chemistry. C
Through in situ, high-pressure X-ray diffraction experiments we have shown that the homoleptic perovskite-like coordination polymer [(CH3)2NH2]Cu(HCOO)3 undergoes a pressure-induced orbital reordering phase transition above 5.20 GPa. This transition
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::186f565b06799764900b0e9b1fa8689a
https://doi.org/10.26434/chemrxiv.14465379.v1
Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání

Omezení vyhledávání
Plný text Recenzováno Digitální knihovna AV ČR
Zdroje