Zobrazeno 1 - 10
of 3 053
pro vyhledávání: '"Tokunaga, Y."'
Autor:
Tokiwa, Y., Opletal, . P., Sakai, H., Kambe, S., Yamamoto, E., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Haga, Y., Tokunaga, Y.
Publikováno v:
Phys. Rev. B 109, L140502 (2024)
The normal-conducting state of the superconductor UTe$_2$ is studied by entropy analysis for magnetic fields along the $b$-axis, obtained from magnetization using the relation $(\partial M/\partial T)_B=(\partial S/\partial B)_T$. We observe a strong
Externí odkaz:
http://arxiv.org/abs/2402.16258
Autor:
Ihara, Y., Hiyoshi, R., Shimohashi, M., Kumar, R., Sasaki, T., Hirata, M., Araki, Y., Tokunaga, Y., Arima, T.
We have performed $^{115}$In-NMR spectroscopy for Ni$_{2}$InSbO$_6$ with corundum-related crystal structure to reveal magnetic structures that develop in high magnetic fields. At low fields Ni$_{2}$InSbO$_6$ shows a helical magnetic order with a long
Externí odkaz:
http://arxiv.org/abs/2307.09082
Autor:
Tokiwa, Y., Kambe, H. Sakai. S., Opletal, P., Yamamoto, E., Kimata, M., Awaji, S., Sasaki, T., Yanase, Y., Haga, Y., Tokunaga, Y.
Publikováno v:
Phys. Rev. B 108, 144502 (2023)
The vortex dynamics in the spin-triplet superconductor, UTe$_2$, are studied by measuring the DC electrical resistivity with currents along the $a$-axis under magnetic fields along the $b$-axis. Surprisingly, we have discovered an island region of lo
Externí odkaz:
http://arxiv.org/abs/2305.17840
Autor:
Gen, M., Ishikawa, H., Miyake, A., Yajima, T., Jeschke, H. O., Sagayama, H., Ikeda, A., Matsuda, Y. H., Kindo, K., Tokunaga, M., Kohama, Y., Kurumaji, T., Tokunaga, Y., Arima, T.
Publikováno v:
Phys. Rev. Mater. 7, 104404 (2023)
We investigate the crystallographic and magnetic properties of a chromium-based thiospinel CuGaCr$_{4}$S$_{8}$. From a synchrotron x-ray diffraction experiment and structural refinement, Cu and Ga atoms are found to occupy the tetrahedral $A$-sites i
Externí odkaz:
http://arxiv.org/abs/2303.10671
Autor:
Kitazawa, T., Ikeda, Y., Sakakibara, T., Matsuo, A., Shimizu, Y., Tokunaga, Y., Haga, Y., Kindo, K., Nambu, Y., Ikeuchi, K., Kamazawa, K., Ohkawara, M., Fujita, M.
Publikováno v:
Phys. Rev. B 108, 085105 (2023)
We demonstrate field-induced single-ion magnetic anisotropy resulting from the multiorbital Kondo effect on the diluted ytterbium alloy $(\mathrm{Lu}_{1-x}\mathrm{Yb}_x)\mathrm{Rh}_2\mathrm{Zn}_{20}$. Single-ion anisotropic metamagnetic behavior is r
Externí odkaz:
http://arxiv.org/abs/2301.07038
Autor:
Tokiwa, Y., Opletal, P., Sakai, H., Kubo, K., Yamamoto, E., Kambe, S., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Tokunaga, Y., Haga, Y.
Influence of metamagnetism on superconductivity is studied for the field along an easy $a$-axis by AC magnetic susceptibility, magnetization, and magnetocaloric effect (MCE) in UTe$_2$. The improvement of crystal quality leads to an upward curvature
Externí odkaz:
http://arxiv.org/abs/2210.11769
Autor:
Sakai, H., Tokiwa, Y., Opletal, P., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Kambe, S., Tokunaga, Y., Haga, Y.
Publikováno v:
Phys. Rev. Lett. 130, 196002 (2023)
The superconducting (SC) phase diagram in uranium ditelluride is explored under magnetic fields ($H$) along the hard magnetic b-axis using a high-quality single crystal with $T_{\rm c} = 2.1$ K. Simultaneous electrical resistivity and AC magnetic sus
Externí odkaz:
http://arxiv.org/abs/2210.05909
Autor:
Kinjo, K., Fujibayashi, H., Kitagawa, S., Ishida, K., Tokunaga, Y., Sakai, H., Kambe, S., Nakamura, A., Shimizu, Y., Homma, Y., Li, D. X., Honda, F., Aoki, D., Hiraki, K., Kimata, M., Sasaki, T.
Publikováno v:
Physical Review B 107 L060502 (2023)
UTe2 is a recently discovered spin-triplet superconductor. One of the characteristic features of UTe2 is a magnetic field (H)-boosted superconductivity above 16 T when H is applied exactly parallel to the b axis. To date, this superconducting (SC) st
Externí odkaz:
http://arxiv.org/abs/2206.02444
Autor:
Peedu, L., Kocsis, V., Szaller, D., Forrai, B., Bordács, S., Kézsmárki, I., Viirok, J., Nagel, U., Bernáth, B., Kamenskyi, D. L., Miyata, A., Portugall, O., Tokunaga, Y., Tokura, Y., Taguchi, Y., Rõõm, T.
We investigated the spin excitations of magnetoelectric $\text{LiFePO}_4$ by THz absorption spectroscopy in magnetic fields up to 33$\,$T. By studying their selection rules, we found not only magnetic-dipole, but also electric-dipole active (electrom
Externí odkaz:
http://arxiv.org/abs/2204.12967
Autor:
Gen, M., Miyake, A., Yagiuchi, H., Watanabe, Y., Ikeda, A., Matsuda, Y. H., Tokunaga, M., Arima, T., Tokunaga, Y.
The polar magnet CaBaCo$_{4}$O$_{7}$ is known to exhibit the largest magnetic-field-driven electric polarization change ($\Delta P$) associated with an antiferromagnetic (AFM)-ferrimagnetic (FIM) transition in a narrow temperature range between 62 an
Externí odkaz:
http://arxiv.org/abs/2203.16397