R. McFadden

activity

20172026

most citedObservation of a charge-neutral muon-polaron complex in antiferromagnetic Cr

_{2}

_{3}

23 citations · 184 across the 26 of their papers we have counts for

collaborators

Showing 2025Show all

3 papers · 1 filter

cond-mat.supr-con2025★ 2 cited

Niobium's intrinsic coherence length and penetration depth revisited using low-energy muon spin spectroscopy and secondary-ion mass spectrometry

Ryan M. L. McFadden, Jonathan W. Angle, Eric M. Lechner +7

We report direct, simultaneous measurements of the London penetration depth ( $λ_{L}$ ) and Bardeen-Cooper-Schrieffer (BCS) coherence length ( $ξ_{0}$ ) in oxygen-doped niobium, with impur…

cond-mat.mtrl-sci2025

Implantation studies of low-energy positive muons in niobium thin films

Ryan M. L. McFadden, Andreas Suter, Leon Ruf +5

Here we study the range of keV positive muons $μ^{+}$ implanted in Nb $_{2}$ O $_{5}$ ( $x$ nm)/Nb( $y$ nm)/SiO $_{2}$ (300 nm)/Si [ $x$ = 3.6 nm, 3.3 nm; $y$ = 42.0 nm, 60.1 nm] thin films using l…

cond-mat.mtrl-sci2025★ 3 cited

Lithium-ion dynamics in synthetic quartz studied via the NMR of implanted $^{8}$ Li $^{+}$

W. Andrew MacFarlane, Ryan M. L. McFadden, Signy Spencer +11

We report $β$ -detected nuclear magnetic resonance ( $β$ -NMR) measurements of implanted $^{8}$ Li $^{+}$ in a synthetic single crystal of $α$ -SiO $_{2}$ (quartz). At 6.55 Tesla, the spect…

Niobium's intrinsic coherence length and penetration depth revisited using low-energy muon spin spectroscopy and secondary-ion mass spectrometry

Implantation studies of low-energy positive muons in niobium thin films

Lithium-ion dynamics in synthetic quartz studied via the NMR of implanted 8Li+

Lithium-ion dynamics in synthetic quartz studied via the NMR of implanted $^{8}$ Li $^{+}$