Materials Today, volume 48, pages 18-28
Superconductivity at 253 K in lanthanum–yttrium ternary hydrides
Troyan Ivan A.
2
,
Ivanova Anna
2
,
Kruglov Ivan A.
3
,
Hanfland M.
4
,
Sadakov A.V.
5
,
Pervakov K.S.
5
,
LYUBUTIN I.S.
2
,
Glazyrin K.
6
,
Giordano Nico
6
,
Karimov Denis N.
2
,
Vasiliev Alexander
2, 3
,
Akashi Ryosuke
7
,
Pudalov V.M.
8, 9
,
2
6
Deutsches Elektronen-Synchrotron, D-22607 Hamburg, Germany
|
7
University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113–8654, Japan
|
Publication type: Journal Article
Publication date: 2021-09-01
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Polyhydrides offer intriguing perspectives as high-temperature superconductors. Here we report the high-pressure synthesis of a series of lanthanum-yttrium ternary hydrides: cubic hexahydride $(La,Y)H_{6}$ with a critical temperature $T_{C}$ = 237 +/- 5 K and decahydrides $(La,Y)H_{10}$ with a maximum $T_{C}$ ~${253 K}$ and an extrapolated upper critical magnetic field $B_{C2(0)}$ up to ${135 T}$ at 183 GPa. This is one of the first examples of ternary high-$T_{C}$ superconducting hydrides. Our experiments show that a part of the atoms in the structures of recently discovered ${Im3m}$-$YH_{6}$ and ${Fm3m}$-$LaH_{10}$ can be replaced with lanthanum (~70 %) and yttrium (~25 %), respectively, with a formation of unique ternary superhydrides containing incorporated $La@H_{24}$ and $Y@H_{32}$ which are specific for ${Im3m}$-$LaH_{6}$ and ${Fm3m}$-$YH_{10}$. Ternary La-Y hydrides were obtained at pressures of 170-196 GPa via the laser heating of $P6_{3}$${/mmc}$ lanthanum-yttrium alloys in the ammonia borane medium at temperatures above 2000 K. A novel tetragonal $(La,Y)H_{4}$ was discovered as an impurity phase in synthesized cubic $(La,Y)H_{6}$. The current-voltage measurements show that the critical current density $J_{C}$ in $(La,Y)H_{10}$ may exceed $2500 A/mm^{2}$ at 4.2 K, which is comparable with that for commercial superconducting wires such as ${NbTi}$, $Nb_{3}$${Sn}$. Hydrides that are unstable in a pure form may nevertheless be stabilized at relatively low pressures in solid solutions with superhydrides having the same structure.
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Semenok D. V. et al. Superconductivity at 253 K in lanthanum–yttrium ternary hydrides // Materials Today. 2021. Vol. 48. pp. 18-28.
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Semenok D. V., Troyan I. A., Ivanova A., Kvashnin A. G., Kruglov I. A., Hanfland M., Sadakov A., Sobolevskiy O. A., Pervakov K., LYUBUTIN I., Glazyrin K., Giordano N., Karimov D. N., Vasiliev A., Akashi R., Pudalov V., Oganov A. R. Superconductivity at 253 K in lanthanum–yttrium ternary hydrides // Materials Today. 2021. Vol. 48. pp. 18-28.
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TY - JOUR
DO - 10.1016/j.mattod.2021.03.025
UR - https://doi.org/10.1016%2Fj.mattod.2021.03.025
TI - Superconductivity at 253 K in lanthanum–yttrium ternary hydrides
T2 - Materials Today
AU - Semenok, Dmitry V.
AU - Troyan, Ivan A.
AU - Ivanova, Anna
AU - Kvashnin, Alexander G.
AU - Kruglov, Ivan A.
AU - Hanfland, M.
AU - Sadakov, A.V.
AU - Sobolevskiy, O. A.
AU - Pervakov, K.S.
AU - LYUBUTIN, I.S.
AU - Glazyrin, K.
AU - Giordano, Nico
AU - Karimov, Denis N.
AU - Vasiliev, Alexander
AU - Akashi, Ryosuke
AU - Pudalov, V.M.
AU - Oganov, A. R.
PY - 2021
DA - 2021/09/01 00:00:00
PB - Elsevier
SP - 18-28
VL - 48
SN - 1369-7021
ER -
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@article{2021_Semenok,
author = {Dmitry V. Semenok and Ivan A. Troyan and Anna Ivanova and Alexander G. Kvashnin and Ivan A. Kruglov and M. Hanfland and A.V. Sadakov and O. A. Sobolevskiy and K.S. Pervakov and I.S. LYUBUTIN and K. Glazyrin and Nico Giordano and Denis N. Karimov and Alexander Vasiliev and Ryosuke Akashi and V.M. Pudalov and A. R. Oganov},
title = {Superconductivity at 253 K in lanthanum–yttrium ternary hydrides},
journal = {Materials Today},
year = {2021},
volume = {48},
publisher = {Elsevier},
month = {sep},
url = {https://doi.org/10.1016%2Fj.mattod.2021.03.025},
pages = {18--28},
doi = {10.1016/j.mattod.2021.03.025}
}