R. Kiefl

activity

19962026

most citedMuon Spin Relaxation Investigation of the Spin Dynamics of Geometrically Frustrated Antiferromagnets Y2Mo2O7 and Tb2Mo2O7 Static Critical Behavior of the Spin-Freezing

128 citations · 1.5k across the 50 of their papers we have counts for

collaborators

Showing cond-mat.mtrl-sciShow all

15 papers · 1 filter

cond-mat.mtrl-sci2026

Contrasting impurity-induced magnetism and dynamics in 2H-MoTe2

Jonas A. Krieger, Igor P. Rusinov, Sourabh Barua +13

We investigate the behavior of interstitial $^{8}$ Li $^{+}$ implanted near the surface of 2H-MoTe $_{2}$ using $β$ -detected NMR. We find that, unlike the muon, $^{8}$ Li $^{+}$ does not show any…

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…

cond-mat.mtrl-sci2022★ 6 cited

Depth-resolved measurement of the Meissner screening profile in a niobium thin film from spin-lattice relaxation of the implanted $β$ -emitter $^{8}$ Li

Ryan M. L. McFadden, Md Asaduzzaman, Terry J. Buck +11

We report measurements of the Meissner screening profile in a Nb(300 nm)/Al $_{2}$ O $_{3}$ thin film using $^{8}$ Li $β$ -detected nuclear magnetic resonance ( $β$ -NMR). The NMR probe $…

cond-mat.mtrl-sci2022★ 12 cited

A New High Parallel-Field Spectrometer at TRIUMF's $β$ -NMR Facility

Edward Thoeng, Ryan M. L. McFadden, Suresh Saminathan +16

A new high field spectrometer has been built to extend the capabilities of the $β$ -detected nuclear magnetic resonance ( $β$ -NMR) facility at TRIUMF. This new beamline extension all…

cond-mat.mtrl-sci2021★ 16 cited

Local Electronic Structure and Dynamics of Muon-Polaron Complexes in Fe $_{2}$ O $_{3}$

M. H. Dehn, J. K. Shenton, D. J. Arseneau +5

We perform detailed muon spin rotation ( $μ$ SR) measurements in the classic antiferromagnet Fe $_{2}$ O $_{3}$ and explain the spectra by considering dynamic population and dissociation of…

cond-mat.mtrl-sci2019★ 12 cited

Local electronic and magnetic properties of the doped topological insulators Bi $_{2}$ Se $_{3}$ :Ca and Bi $_{2}$ Te $_{3}$ :Mn investigated using ion-implanted $^{8}$ Li $β$ -NMR

Ryan M. L. McFadden, Aris Chatzichristos, David L. Cortie +13

We report $β$ -detected nuclear magnetic resonance ( $β$ -NMR) measurements in Bi $_{2}$ Se $_{3}$ :Ca (BSC) and Bi $_{2}$ Te $_{3}$ :Mn (BTM) single crystals using $^{8}$ Li $^{+}$ implanted t…

cond-mat.mtrl-sci2019★ 23 cited

Observation of a charge-neutral muon-polaron complex in antiferromagnetic Cr $_{2}$ O $_{3}$

M. H. Dehn, J. K. Shenton, S. Holenstein +13

We report a comprehensive muon spin rotation ( $μ$ SR) study of the prototypical magnetoelectric antiferromagnet Cr $_{2}$ O $_{3}$ . We find the positively charged muon ( $μ^{+}$ ) occupies sev…

cond-mat.mtrl-sci2019★ 5 cited

Investigation of Ionic and Anomalous Magnetic Behavior in CrSe $_{2}$ Using $^{8}$ Li $β$ -NMR

John O. Ticknor, Izumi Umegaki, Ryan M. L. McFadden +12

We have studied a mosaic of 1T-CrSe $_{2}$ single crystals using $β$ -detected nuclear magnetic resonance of $^{8}$ Li from 4 to 300 K. We identify two broad resonances that show no evi…

cond-mat.mtrl-sci2018★ 5 cited

Bi-Arrhenius diffusion and surface trapping of $^{8}$ Li $^{+}$ in rutile TiO $_{2}$

A. Chatzichristos, R. M. L. McFadden, M. H. Dehn +11

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 radiotrac…

cond-mat.mtrl-sci2018★ 14 cited

Ionic and electronic properties of the topological insulator Bi $_{2}$ Te $_{2}$ Se investigated using $β$ -detected nuclear magnetic relaxation and resonance of $^{8}$ Li

Ryan M. L. McFadden, Aris Chatzichristos, Kim H. Chow +16

We report measurements on the high temperature ionic and low temperature electronic properties of the 3D topological insulator Bi $_{2}$ Te $_{2}$ Se using ion-implanted $^{8}$ Li $β$ -detecte…

cond-mat.mtrl-sci2017★ 17 cited

Microscopic Dynamics of Li $^{+}$ in Rutile TiO $_{2}$ Revealed by $^{8}$ Li $β$ -detected NMR

Ryan M. L. McFadden, Terry J. Buck, Aris Chatzichristos +19

We report measurements of the dynamics of isolated $^{8}$ Li $^{+}$ in single crystal rutile TiO $_{2}$ using $β$ -detected NMR. From spin-lattice relaxation and motional narrowing, we…

cond-mat.mtrl-sci2017★ 5 cited

Determination of the nature of fluctuations using $^{8} L i$ and $^{9} L i$ $β$ -NMR and spin-lattice relaxation

A. Chatzichristos, R. M. L. McFadden, V. L. Karner +7

We report a comparison of the $1/ T_{1}$ spin lattice relaxation rates (SLR) for $^{9} L i$ and $^{8} L i$ in Pt and SrTiO $_{3}$ , in order to differentiate between magnetic and electric quadr…

cond-mat.mtrl-sci2012★ 73 cited

Nature of weak magnetism in SrTiO3/LaAlO3 multilayers

Z. Salman, O. Ofer, M. Radovic +12

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 superlatti…

cond-mat.mtrl-sci2011★ 20 cited

Depth Dependence of the Structural Phase Transition of SrTiO_3 Studied with β-NMR and Grazing Incidence X-ray Diffraction

Z. Salman, M. Smadella, W. A. MacFarlane +7

We present an investigation of the near-surface tetragonal phase transition in SrTiO3, using the complementary techniques of beta-detected nuclear magnetic resonance and grazing-in…

cond-mat.mtrl-sci2007★ 34 cited

Beta-NMR of Isolated Lithium in Nearly Ferromagnetic Palladium

T. J. Parolin, Z. Salman, J. Chakhalian +13

The temperature dependence of the frequency shift and spin-lattice relaxation rate of isolated, nonmagnetic Li-8 impurities implanted in a nearly ferromagnetic host (Pd) are measur…

Contrasting impurity-induced magnetism and dynamics in 2H-MoTe2

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

Depth-resolved measurement of the Meissner screening profile in a niobium thin film from spin-lattice relaxation of the implanted β-emitter 8Li

A New High Parallel-Field Spectrometer at TRIUMF's β-NMR Facility

Local Electronic Structure and Dynamics of Muon-Polaron Complexes in Fe2​O3​

Local electronic and magnetic properties of the doped topological insulators Bi2​Se3​:Ca and Bi2​Te3​:Mn investigated using ion-implanted 8Li β-NMR

Observation of a charge-neutral muon-polaron complex in antiferromagnetic Cr2​O3​

Investigation of Ionic and Anomalous Magnetic Behavior in CrSe2​ Using 8Li β-NMR

Bi-Arrhenius diffusion and surface trapping of 8Li+ in rutile TiO2​

Ionic and electronic properties of the topological insulator Bi2​Te2​Se investigated using β-detected nuclear magnetic relaxation and resonance of 8Li

Microscopic Dynamics of Li+ in Rutile TiO2​ Revealed by 8Li β-detected NMR

Determination of the nature of fluctuations using 8Li and 9Li β-NMR and spin-lattice relaxation