Zobrazeno 1 - 10
of 426
pro vyhledávání: '"Choi, E M"'
Autor:
Singh, S., Haraldsen, J. T., Xiong, J., Choi, E. M., Lu, P., Yi, D., Wen, X. -D., Liu, J., Wang, H., Bi, Z., Yu, P., Fitzsimmons, M. R., MacManus-Driscoll, J. L., Ramesh, R., Balatsky, A. V., Zhu, Jian-Xin, Jia, Q. X.
Using polarized neutron reflectometry (PNR), we observe an induced magnetization of 75$\pm$ 25 kA/m at 10 K in a La$_{0.7}$Sr$_{0.3}$MnO$_3$ (LSMO)/BiFeO$_3$ superlattice extending from the interface through several atomic layers of the BiFeO$_3$ (BF
Externí odkaz:
http://arxiv.org/abs/1407.0723
Autor:
Ramazanoglu, M., Laver, M., Yagmurcu, A., Choi, E. -M., Lee, S. -I., Knigavko, A., Gaulin, B. D.
Publikováno v:
Low Temperature Physics FNT vol.40, N.2, 2014, pp 205-210
The superconducting and magnetic properties of HoNi2B2C single crystals are investigated through transport, magnetometry and small-angle neutron scattering measurements. In the magnetic phases that enter below the superconducting critical temperature
Externí odkaz:
http://arxiv.org/abs/1405.2109
Autor:
Zholobenko, A. N., Mikitik, G. P., Fil, V. D., Fil, D. V., Kim, J. D., Choi, E. M., Lee, S. I.
Publikováno v:
Low Temp. Phys. 31 (2005) 1043
The field dependences of the Labush parameter in nonmagnetic borocarbides are measured by a method that does not require achieving a critical state. The expected values of the critical current are estimated. The values obtained are two order of magni
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601115
Autor:
Huang, C. L., Lin, J. Y., Sun, C. P., Lee, T. K., Kim, J. D., Choi, E. M., Lee, S. I., Yang, H. D.
Publikováno v:
Physical Review B 73, 012502 (2006)
The magnetic field dependence of low temperature specific heat in YNi2B2C was measured and analyzed using various pairing order parameters. At zero magnetic field, the two-gap model which has been successfully applied to MgB2 and the point-node model
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512291
We have measured temperature and magnetic field dependencies of the sound velocities and the sound attenuation in HoNi2B2C single crystals. The main result is a huge softening the velocity of C66 mode due to a cooperative Jahn-Teller effect, resultin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406007
Autor:
Demsar, J., Averitt, R. D., Taylor, A. J., Kabanov, V. V., Kang, W. N., Kim, H. J., Choi, E. M., Lee, S. I.
We present studies of the photoexcited quasiparticle dynamics in MgB2 where, using femtosecond optical techniques, Cooper pair breaking dynamics (PBD) have been temporally resolved for the first time. The PBD are strongly temperature and photoexcitat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310379
Autor:
Yanson, I. K., Naidyuk, Yu. G., Kvitnitskaya, O. E., Fisun, V. V., Bobrov, N. L., Chubov, P. N., Ryabovol, V. V., Behr, G., Kang, W. N., Choi, E. -M., Kim, H. -J., Lee, S. -I., Aizawa, T., Otani, S., Drechsler, S. -L.
Publikováno v:
Modern Physics Letters B, Vol. 17, Nos. 10-12 (2003) 657-666
We review investigations of the electron-phonon interaction (EPI) in metal diborides MeB_2 (Me=Zr, Nb, Ta, Mg) by point-contact (PC) spectroscopy. For transition metal compounds the PC EPI functions were recovered and EPI parameter $\lambda\lesssim 0
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212599
Autor:
Barkov, F. L., Shantsev, D. V., Johansen, T. H., Goa, P. E., Kang, W. N., Kim, H. J., Choi, E. M., Lee, S. I.
Publikováno v:
Phys. Rev. B 67, 064513 (2003)
Using magneto-optical imaging the phenomenon of dendritic flux penetration in superconducting films was studied. Flux dendrites were abruptly formed in a 300 nm thick film of MgB2 by applying a perpendicular magnetic field. Detailed measurements of f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205361
Autor:
Bobyl, A. V., Shantsev, D. V., Johansen, T. H., Kang, W. N., Kim, H. J., Choi, E. M., Lee, S. I.
Publikováno v:
Appl. Phys. Lett. v.80, p.4588-4590 (2002)
Magneto-optical imaging reveals that in superconducting films of MgB2 a transport current creates avalanche-like flux dynamics where highly branching dendritic penetration patterns are formed. The instability is triggered when the current exceeds a t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201260
Autor:
Olsson, R. J., Kwok, W. K., Karapetrov, G., Iavarone, M., Claus, H., Peterson, C., Crabtree, G. W., Kang, W. N., Kim, H. J., Choi, E. M., Lee, Sung-Ik
We report on the transport, magnetization, and scanning tunneling spectroscopy measurements on c-axis oriented thin films of MgB2 irradiated with high energy heavy ions of uranium and gold. We find a slight shift in the irreversibility and upper crit
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201022