Zobrazeno 1 - 10
of 612
pro vyhledávání: '"MACFARLANE, W."'
Autor:
Thoeng, Edward, Asaduzzaman, Md., Kolb, Philipp, McFadden, Ryan M. L., Morris, Gerald D., Ticknor, John O., Dunsiger, Sarah R., Karner, Victoria L., Fujimoto, Derek, Junginger, Tobias, Kiefl, Robert F., MacFarlane, W. Andrew, Li, Ruohong, Saminathan, Suresh, Laxdal, Robert E.
Publikováno v:
Sci. Rep. 14, 21487 (2024)
We report direct measurements of the magnetic field screening at the limits of the Meissner phase for two superconducting Nb samples. The samples are processed with two different surface treatments that have been developed for superconducting radio-f
Externí odkaz:
http://arxiv.org/abs/2405.05451
Autor:
Andriushin, Nikita D., Grumbach, Justus, Kim, Jung-Hwa, Reehuis, Manfred, Tymoshenko, Yuliia V., Onykiienko, Yevhen A., Jain, Anil, MacFarlane, W. Andrew, Maljuk, Andrey, Granovsky, Sergey, Hoser, Andreas, Pomjakushin, Vladimir, Ollivier, Jacques, Doerr, Mathias, Keimer, Bernhard, Inosov, Dmytro S., Peets, Darren C.
Publikováno v:
Phys. Rev. B 108, 174420 (2023)
The cubic perovskite SrFeO$_3$ was recently reported to host hedgehog- and skyrmion-lattice phases in a highly symmetric crystal structure which does not support the Dzyaloshinskii-Moriya interactions commonly invoked to explain such magnetic order.
Externí odkaz:
http://arxiv.org/abs/2309.15594
Autor:
Ticknor, John O., Adelman, Jonah R., Chatzichristos, Aris, Dehn, Martin H., Egoriti, Luca, Fujimoto, Derek, Karner, Victoria L., Kiefl, Robert F., Levy, C. D. Philip, Li, Ruohong, McFadden, Ryan M. L., Morris, Gerald D., Oudah, Mohamed, Stachura, Monika, Thoeng, Edward, MacFarlane, W. Andrew
Publikováno v:
Phys. Rev. B 108, 195437 (2023)
We report $\beta$-detected nuclear magnetic resonance of ultra-dilute $^{8}$Li$^{+}$ implanted in highly oriented pyrolytic graphite (HOPG). The absence of motional narrowing and diffusional spin-lattice relaxation implies Li$^+$ is not appreciably m
Externí odkaz:
http://arxiv.org/abs/2301.07821
Autor:
McFadden, Ryan M. L., Asaduzzaman, Md, Buck, Terry J., Cortie, David L., Dehn, Martin H., Dunsiger, Sarah R., Kiefl, Robert F., Laxdal, Robert E., Levy, C. D. Philip, MacFarlane, W. Andrew, Morris, Gerald D., Pearson, Matthew R., Thoeng, Edward, Junginger, Tobias
Publikováno v:
J. Appl. Phys. 134, 163902 (2023)
We report measurements of the Meissner screening profile in a Nb(300 nm)/Al$_{2}$O$_{3}$ thin film using $^{8}$Li $\beta$-detected nuclear magnetic resonance ($\beta$-NMR). The NMR probe $^{8}$Li was ion-implanted into the Nb film at energies $\leq$
Externí odkaz:
http://arxiv.org/abs/2212.01137
Autor:
Thoeng, Edward, McFadden, Ryan M. L., Saminathan, Suresh, Morris, Gerald D., Kolb, Philipp, Matheson, Ben, Asaduzzaman, Md, Baartman, Richard, Dunsiger, Sarah R., Fujimoto, Derek, Junginger, Tobias, Karner, Victoria L., Kiy, Spencer, Li, Ruohong, Stachura, Monika, Ticknor, John O., Kiefl, Robert F., MacFarlane, W. Andrew, Laxdal, Robert E.
Publikováno v:
Rev. Sci. Instrum. 94, 023305 (2023)
A new high field spectrometer has been built to extend the capabilities of the $\beta$-detected nuclear magnetic resonance ($\beta$-NMR) facility at TRIUMF. This new beamline extension allows $\beta$-NMR spectroscopy to be performed with fields up to
Externí odkaz:
http://arxiv.org/abs/2211.15619
Autor:
Adelman, Jonah R., Fujimoto, Derek, Dehn, Martin H., Dunsiger, Sarah R., Karner, Victoria L., Levy, C. D. Philip, Li, Ruohong, McKenzie, Iain, McFadden, Ryan M. L., Morris, Gerald D., Pearson, Matthew R., Stachura, Monika, Thoeng, Edward, Ticknor, John O., Ohashi, Naoki, Kojima, Kenji M., MacFarlane, W. Andrew
Publikováno v:
Phys Rev. B 106, 035205 (2022)
We report on the stability and magnetic state of ion implanted $^8$Li in single crystals of the semiconductor ZnO using $\beta$-detected nuclear magnetic resonance. At ultradilute concentrations, the spectra reveal distinct Li sites from 7.6 to 400 K
Externí odkaz:
http://arxiv.org/abs/2109.08637
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
We investigate the near-surface relaxation of freestanding atactic \glsdesc{ps} films with molecular dynamics simulations. As in previous coarse-grained simulations, relaxation times for backbone segments and phenyl rings are linked to their bulk rel
Externí odkaz:
http://arxiv.org/abs/2007.12155
Autor:
McFadden, Ryan M. L., Chatzichristos, Aris, Cortie, David L., Fujimoto, Derek, Hor, Yew San, Ji, Huiwen, Karner, Victoria L., Kiefl, Robert F., Levy, C. D. Philip, Li, Ruohong, McKenzie, Iain, Morris, Gerald D., Pearson, Matthew R., Stachura, Monika, Cava, Robert J., MacFarlane, W. Andrew
Publikováno v:
Phys. Rev. B 102, 235206 (2020)
We report $\beta$-detected nuclear magnetic resonance ($\beta$-NMR) measurements in Bi$_{2}$Se$_{3}$:Ca (BSC) and Bi$_{2}$Te$_{3}$:Mn (BTM) single crystals using $^{8}$Li$^{+}$ implanted to depths on the order of 100 nm. Above $\sim 200$ K, spin-latt
Externí odkaz:
http://arxiv.org/abs/1911.12212