Transverse field muon-spin rotation signature of the skyrmion-lattice phase inCu2OSeO3

Muonium addition to pyrene has been investigated by means of transverse field muon spin rotation and muon level-crossing spectroscopy. Two hydropyrenyl radicals are produced and easily detected while a third is formed in low abundance. Muon and proton hyperfine constants were experimentally determined and compared with semiempirical and ab initio calculations. It is concluded that the radicals are of cyclohexadienyl type, i.e., the Mu adds only to carbon atoms that can assume a tetrahedral -CHMu- configuration without distorting the planar carbon skeleton of pyrene.Key words: muonium, pyrene, radical, hyperfine.

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On the Robustness of the MnSi Magnetic Structure Determined by Muon Spin Rotation

Quantum Beam Science ◽

10.3390/qubs2030019 ◽

2018 ◽

Vol 2 (3) ◽

pp. 19 ◽

Cited By ~ 3

Author(s):

Pierre Dalmas de Réotier ◽

Alain Yaouanc ◽

Alex Amato ◽

Alexander Maisuradze ◽

Daniel Andreica ◽

...

Keyword(s):

Magnetic Structure ◽

Muon Spin ◽

Transverse Field ◽

Spin Rotation ◽

Muon Spin Rotation ◽

Zero Field ◽

Magnetic Structures ◽

Wide Range ◽

Distribution Parameters ◽

Manganese Silicide

Muon spin rotation ( μ SR) spectra recorded for manganese silicide MnSi and interpreted in terms of a quantitative analysis constrained by symmetry arguments were recently published. The magnetic structures of MnSi in zero-field at low temperature and in the conical phase near the magnetic phase transition were shown to substantially deviate from the expected helical and conical structures. Here, we present material backing the previous results obtained in zero-field. First, from simulations of the field distributions experienced by the muons as a function of relevant parameters, we confirm the uniqueness of the initial interpretation and illustrate the remarkable complementarity of neutron scattering and μ SR for the MnSi magnetic structure determination. Second, we present the result of a μ SR experiment performed on MnSi crystallites grown in a Zn-flux and compare it with the previous data recorded with a crystal obtained from Czochralski pulling. We find the magnetic structure for the two types of crystals to be identical within experimental uncertainties. We finally address the question of a possible muon-induced effect by presenting transverse field μ SR spectra recorded in a wide range of temperature and field intensity. The field distribution parameters perfectly scale with the macroscopic magnetization, ruling out a muon-induced effect.

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Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi

Physical Review B ◽

10.1103/physrevb.93.140412 ◽

2016 ◽

Vol 93 (14) ◽

Cited By ~ 10

Author(s):

T. Lancaster ◽

F. Xiao ◽

Z. Salman ◽

I. O. Thomas ◽

S. J. Blundell ◽

...

Keyword(s):

Thin Film ◽

Muon Spin ◽

Transverse Field ◽

Spin Rotation ◽

Muon Spin Rotation ◽

Rotation Measurement

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Radiolabelling Measurements of Radicals Derived from Terpenoid Volatile Organic Conpounds (VOCs) Adsorbed in Porous Carbon

Progress in Reaction Kinetics and Mechanism ◽

10.3184/146867806x197113 ◽

2006 ◽

Vol 31 (3) ◽

pp. 159-188 ◽

Cited By ~ 5

Author(s):

Christopher J. Rhodes

Keyword(s):

Free Radicals ◽

Porous Carbon ◽

Muon Spin ◽

Activation Parameters ◽

Transverse Field ◽

Spin Rotation ◽

Muon Spin Rotation ◽

Longitudinal Field ◽

Reorientational Motion ◽

Volatile Organic

Radiolabelled free radicals were formed by the addition of muonium-a radioactive hydrogen atom with a positive muon as its nucleus-to α-pinene, β-pinene, dihydrocarvone, dihydrocarveol and dipentene, each as adsorbed in porous carbon. The radicals were identified using transverse-field muon spin rotation (TF-MuSR) and the activation parameters associated with their reorientational motion were measured using longitudinal-field muon spin relaxation (LF-MuSRx). Two distinct adsorbed fractions were detected in each sample, characterised by activation energies in the range 2-6 kJ/mol and 12-16 J/mol respectively.

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MUON SPIN ROTATION IN SR2YRU1-UCUUO6

International Journal of Modern Physics B ◽

10.1142/s0217979299003647 ◽

1999 ◽

Vol 13 (29n31) ◽

pp. 3670-3677 ◽

Cited By ~ 16

Author(s):

D. R. HARSHMAN ◽

H. A. BLACKSTEAD ◽

W. J. KOSSLER ◽

A. J. GREER ◽

C. E. STRONACH ◽

...

Keyword(s):

Field Data ◽

Muon Spin ◽

Magnetic Moments ◽

Transverse Field ◽

Sudden Onset ◽

Spin Rotation ◽

Muon Spin Rotation ◽

Zero Field ◽

Slow Dynamic ◽

Oxygen Ions

The magnetic and superconducting behaviors of sintered Sr 2 YRu 1-u Cu u O 6 (for u=0.05, 0.10, 0.15) were probed using transverse- and zero-field muon spin rotation (μ+ SR). In general, positive muons are attracted to oxygen ions in the high-T c oxides, and so, Sr 2 YRu 1-u Cu u O 6 should (and does) present two types of μ+ sites, those associated with the oxygen in the YRuO 4 layers and those associated with the SrO-layer oxygen. The tranverse- and zero-field data for all three stoichiometries u exhibit a sudden onset of magnetic structure at TN~30 K, with a static local field of ~3 kG. This transition is marked by a dramatic increase in the relaxation rate as the temperature decreases below TN, corresponding to an increased static disordering of the magnetic moments. Above TN no static fields are observed. Instead the data exhibit a slow dynamic depolarization, presumably due to the rapid fluctuation of paramagnetic moments. Both transverse- and zero-field data also indicate a smaller second component (~10%) which we associate with the SrO layer, exhibiting superconducting behavior in transverse field with an observed T c ≈TN~30 K.

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