Zobrazeno 1 - 10
of 299
pro vyhledávání: '"Nunez-Regueiro M"'
Autor:
Hansen, M. F., Layek, S., Vaney, J. -B., Chaix, L., Suchomel, M. R., Mikolasek, M., Garbarino, G., Chumakov, A., Rüffer, R., Nassif, V., Hansen, T., Elkaim, E., Pelletier, T., Mayaffre, H., Bernardini, F., Sulpice, A., Núñez-Regueiro, M., Rodière, P., Cano, A., Tencé, S., Toulemonde, P., Julien, M. -H., d'Astuto, M.
The magnetic and structural properties of the recently discovered pnictogen/chalcogen-free superconductor LaFeSiH ($T_c\simeq10$~K) have been investigated by $^{57}$Fe synchrotron M{\"o}ssbauer source (SMS) spectroscopy, x-ray and neutron powder diff
Externí odkaz:
http://arxiv.org/abs/2309.02241
Autor:
Galdino, C. W., Freitas, D. C., Medrano, C. P. C., Sanchez, D. R., Tartaglia, R., Rabello, L. P., Mendonça, A. A., Ghivelder, L., Continentino, M. A., Zapata, M. J. M., Pinheiro, C. B., Azevedo, G. M., Rodríguez-Velamazán, J. A., Garbarino, G., Núñez-Regueiro, M., Granado, E.
In this work, we investigate the representative case of the homometallic Co ludwigite Co$^{2+}_2$Co$^{3+}$O$_2$BO$_3$ ($Pbam$ space group) with four distinct Co crystallographic sites [$M1$-$M4$] surrounded by oxygen octahedra. The mixed-valent chara
Externí odkaz:
http://arxiv.org/abs/2107.14757
Autor:
Svitlyk, V., Garbarino, G., Rosa, A. D., Pomjakushina, E., Krzton-Maziopa, A., Conder, K., Nunez-Regueiro, M., Mezouar, M.
Publikováno v:
J. Phys.: Condens. Matter 31 (2019) 085401
BaFe2Se3 is a potential superconductor material exhibiting transition at 11 K and ambient pressure. Here we extended the structural and performed electrical resistivity measurements on this compound up to 51 GPa and 20 GPa, respectively, in order to
Externí odkaz:
http://arxiv.org/abs/1808.03952
Autor:
Bernardini, F., Garbarino, G., Sulpice, A., Núñez-Regueiro, M., Gaudin, E., Chevalier, B., Méasson, M. -A., Cano, A., Tencé, S.
Publikováno v:
Phys. Rev. B 97, 100504 (2018)
We report the synthesis and characterization of the novel silicide LaFeSiH displaying superconductivity with onset at 11 K. We find that this pnictogen-free compound is isostructural to LaFeAsO, with a similar low-temperature tetragonal to orthorhomb
Externí odkaz:
http://arxiv.org/abs/1701.05010
Autor:
Freitas, D. C., Rodiere, P, Osorio, M. R., Navarro-Moratalla, E, Nemes, N. M., Tissen, V. G., Cario, L, Coronado, E, García-Hernández, M, Vieira, S, Núñez-Regueiro, M, Suderow, H
We present measurements of the superconducting and charge density wave critical temperatures (Tc and TCDW) as a function of pressure in the transition metal dichalchogenides 2H-TaSe2 and 2H-TaS2. Resistance and susceptibility measurements show that T
Externí odkaz:
http://arxiv.org/abs/1603.00425
Autor:
Freitas, D. C., Rodière, P., Núñez, M., Marcus, J., Gay, F., Continentino, M. A., Núñez-Regueiro, M.
Publikováno v:
Phys. Rev. B 92, 205123 (2015)
We study the Cr_(1-x) Re_x phase diagram finding that its phase transition temperature towards an antiferromagnetic order T_N follows a quantum [(x_c-x)/x_c ]^{\psi} law, with {\psi}=1/2, from the quantum critical point (QCP) at x_c=0.25 up to T_N=60
Externí odkaz:
http://arxiv.org/abs/1406.4647
Publikováno v:
Phys. Rev. B 88, 180504(R) (2013)
We measure the electrical resistance of o-TaS3 between 1K and 300K under pressures up to 20GPa. We observe a gradual decrease of the charge density wave transition temperature with increasing pressure P following a mean-field quantum fluctuation powe
Externí odkaz:
http://arxiv.org/abs/1310.3827
Autor:
Bordet, P., Mezouar, M., Nunez-Regueiro, M., Monteverde, M., Nunez-Regueiro, M. D., Rogado, N., Regan, K. A., Hayward, M. A., He, T., Loureiro, S. M., Cava, R. J.
We report measurements on MgB2 up to ~40GPa. Increasing pressure yields a monotonous decrease of the lattice parameters and of the c/a ratio, but no structural transition down to parameters smaller than those of AlB2. The transition superconducting t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106585
Autor:
Carlsson, S. J. E., Levy-Bertrand, F., Marcenat, C., Sulpice, A., Marcus, J., Pairis, S., Klein, T., Núñez-Regueiro, M., Garbarino, G., Hansen, T., Nassif, V., Toulemonde, P.
Publikováno v:
Phys. Rev. B 84, 104523 (2011)
The antiferromagnetic order and structural distortion in the LaFe(As1-xSbx)O system have been investigated by powder neutron diffraction and physical properties measurements. Polycrystalline samples of LaFe(As1-xSbx)O (x<0.5) were prepared using soli
Externí odkaz:
http://arxiv.org/abs/1110.2645
Autor:
Garbarino, G., Weht, R., Sow, A., Sulpice, A., Toulemonde, P., Álvarez-Murga, M., Strobel, P., Bouvier, P., Mezouar, M., Núñez-Regueiro, M.
The electrical resistivity, crystalline structure and electronic properties calculated from the experimentally measured atomic positions of the compound SmFeAsO$_{0.81}$F$_{0.19}$ have been studied up to pressures ~20GPa. The correlation between the
Externí odkaz:
http://arxiv.org/abs/1106.1361