Zobrazeno 1 - 10
of 421
pro vyhledávání: '"Kiefl, R."'
Autor:
Karner, V. L., Chatzichristos, A., Cortie, D. L., Fujimoto, D., Kiefl, R. F., Levy, C. D. P., Li, R., McFadden, R. M. L., Morris, G. D., Pearson, M. R., Benckiser, E., Boris, A. V., Cristiani, G., Logvenov, G., Keimer, B., MacFarlane, W. A.
Publikováno v:
Phys. Rev. B 104, 205114 (2021)
Using ion-implanted $^8$Li $\beta$-detected NMR, we study the evolution of the correlated metallic state of LaNiO$_3$ in a series of LaNiO$_3$/LaAlO$_3$ superlattices as a function of bilayer thickness. Spin-lattice relaxation measurements in an appl
Externí odkaz:
http://arxiv.org/abs/2106.00211
Autor:
Dehn, M. H., Shenton, J. K., Arseneau, D. J., MacFarlane, W. A., Morris, G. D., Maigné, A., Spaldin, N. A., Kiefl, R. F.
Publikováno v:
Phys. Rev. Lett. 126 037202 (2021)
We perform detailed muon spin rotation ($\mu$SR) measurements in the classic antiferromagnet Fe$_2$O$_3$ and explain the spectra by considering dynamic population and dissociation of charge-neutral muon-polaron complexes. We show that charge-neutral
Externí odkaz:
http://arxiv.org/abs/2101.09235
Autor:
Dehn, M. H., Shenton, J. K., Holenstein, S., Meier, Q. N., Arseneau, D. J., Cortie, D. L., Hitti, B., Fang, A. C. Y., MacFarlane, W. A., McFadden, R. M. L., Morris, G. D., Salman, Z., Luetkens, H., Spaldin, N. A., Fechner, M., Kiefl, R. F.
Publikováno v:
Phys. Rev. X 10, 011036 (2020)
We report a comprehensive muon spin rotation ($\mu$SR) study of the prototypical magnetoelectric antiferromagnet Cr$_2$O$_3$. We find the positively charged muon ($\mu^+$) occupies several distinct interstitial sites, and displays a rich dynamic beha
Externí odkaz:
http://arxiv.org/abs/1909.00416
Autor:
Chatzichristos, A., McFadden, R. M. L., Dehn, M. H., Dunsiger, S. R., Fujimoto, D., Karner, V. L., McKenzie, I., Morris, G. D., Pearson, M. R., Stachura, M., Sugiyama, J., Ticknor, J. O., MacFarlane, W. A., Kiefl, R. F.
Publikováno v:
Phys. Rev. Lett. 123, 095901 (2019)
We report measurements of the diffusion rate of isolated ion-implanted $^{8}$Li$^{+}$ within $\sim$120 nm of the surface of oriented single-crystal rutile TiO$_2$ using a radiotracer technique. The $\alpha$-particles from the $^{8}$Li decay provide a
Externí odkaz:
http://arxiv.org/abs/1810.12537
Autor:
Junginger, T., Abidi, S. H., Astley, R., Buck, T., Dehn, M., Gheidi, S., Kiefl, R., Kolb, P., Storey, D., Thoeng, E., Wasserman, W., Laxdal, R. E
Publikováno v:
Phys. Rev. Accel. Beams 21, 032002 (2018)
The performance of superconducting radiofrequency (SRF) cavities used for particle accelerators depends on two characteristic material parameters: field of first flux entry $H_{entry}$ and pinning strength. The former sets the limit for the maximum a
Externí odkaz:
http://arxiv.org/abs/1705.05480
Autor:
Chatzichristos, A., McFadden, R. M. L., Karner, V. L., Cortie, D. L., Levy, C. D. P., MacFarlane, W. A., Morris, G. D., Pearson, M. R., Salman, Z., Kiefl, R. F.
Publikováno v:
Phys. Rev. B 96, 014307 (2017)
We report a comparison of the $1/T_1$ spin lattice relaxation rates (SLR) for $^9Li$ and $^8Li$ in Pt and SrTiO$_{3}$, in order to differentiate between magnetic and electric quadrupolar relaxation mechanisms. In Pt, the ratio of the $1/T_{1}$ spin r
Externí odkaz:
http://arxiv.org/abs/1703.10156
Autor:
Saadaoui, H., Salman, Z., Luetkens, H., Prokscha, T., Suter, A., MacFarlane, W. A., Jiang, Y., Jin, K., Greene, R. L ., Morenzoni, E., Kiefl, R. F.
Publikováno v:
Nature Communications 6, 6041 (2015)
Superconductors are a striking example of a quantum phenomenon in which electrons move coherently over macroscopic distances without scattering. The high-temperature superconducting oxides(cuprates) are the most studied class of superconductors, comp
Externí odkaz:
http://arxiv.org/abs/1412.2775
Autor:
Salman, Z., Ofer, O., Radovic, M., Hao, H., Chow, K. H., Hossain, M. D., Levy, C. D. P., MacFarlane, W. A., Morris, G. M., Patthey, L., Pearson, M. R., Saadaoui, H., Schmitt, T., Wang, D., Kiefl, R. F.
Publikováno v:
Phys. Rev. Lett. 109, 257207 (2012)
We report the observation of weak magnetism in superlattices of LaAlO3/SrTiO3 using beta-detected nuclear magnetic resonance. The spin lattice relaxation rate of 8 Li in superlattices with a spacer layers of 8 and 6 unit cells of LaAlO3 exhibits a st
Externí odkaz:
http://arxiv.org/abs/1211.4961
Autor:
Ofer, Oren, Chow, K. H., Fan, I., Egilmez, M., Parolin, T. J., Hossain, M. D., Jung, J., Salman, Z., Kiefl, R. F., Levy, C. D. P., Morris, G. D., Pearson, M. R., Saadaoui, H., Song, Q., Wang, D., MacFarlane, W. A.
Publikováno v:
Phys. Rev. B 86, 064419 (2012)
We report {\beta} detected nuclear magnetic resonance ({\beta}NMR) measurements of 8Li+ implanted into high purity Pt. The frequency of the 8Li {\beta}NMR resonance and the spin-lattice relaxation rates 1/T1 were measured at temperatures ranging from
Externí odkaz:
http://arxiv.org/abs/1208.3873
Autor:
Morenzoni, E., Saadaoui, H., Wang, D., Horisberger, M., Kirk, E., MacFarlane, W. A., Morris, G. D., Chow, K. H., Hossain, M. D., Levy, C. P., Parolin, T. J., Pearson, M. R., Song, Q., Kiefl, R. F.
Publikováno v:
Physical Review B 85, 220501(R) (2012)
We report beta-NMR investigations of polarized 8Li implanted in thin Pb and Ag/Nb films. At the critical superconducting temperature, we observe a singular peak in the spin relaxation rate in small longitudinal magnetic fields, which is attributed to
Externí odkaz:
http://arxiv.org/abs/1109.4508