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

2018 ◽  
Vol 2 (3) ◽  
pp. 19 ◽  
Author(s):  
Pierre Dalmas de Réotier ◽  
Alain Yaouanc ◽  
Alex Amato ◽  
Alexander Maisuradze ◽  
Daniel Andreica ◽  
...  

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.

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3670-3677 ◽  
Author(s):  
D. R. HARSHMAN ◽  
H. A. BLACKSTEAD ◽  
W. J. KOSSLER ◽  
A. J. GREER ◽  
C. E. STRONACH ◽  
...  

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.


1991 ◽  
Vol 15 (5) ◽  
pp. 547-552 ◽  
Author(s):  
L. P Le ◽  
G. M Luke ◽  
B. J Sternlieb ◽  
W. D Wu ◽  
Y. J Uemura ◽  
...  

2018 ◽  
Vol 551 ◽  
pp. 137-141 ◽  
Author(s):  
Hiroshi Nozaki ◽  
Hiroya Sakurai ◽  
Oren Ofer ◽  
Eduardo J. Ansaldo ◽  
Jess H. Brewer ◽  
...  

2011 ◽  
Vol 83 (5) ◽  
Author(s):  
P. K. Biswas ◽  
G. Balakrishnan ◽  
D. McK. Paul ◽  
M. R. Lees ◽  
A. D. Hillier

2015 ◽  
Vol 91 (22) ◽  
Author(s):  
T. Lancaster ◽  
R. C. Williams ◽  
I. O. Thomas ◽  
F. Xiao ◽  
F. L. Pratt ◽  
...  

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542026 ◽  
Author(s):  
C. Boekema ◽  
F. Owens ◽  
A. Love ◽  
Z. Li ◽  
P. Sakkaris ◽  
...  

The fundamental physics of cuprate superconductivity is still much deliberated after three decades of research. In contrast to phononic or polaronic roots, some major theories promote a magnetic origin. In this perspective, we review cuprate magnetism, as probed by muon-spin-rotation [Formula: see text] in [Formula: see text] (RBCO), [Formula: see text] (Bi2212) and [Formula: see text] (Tl2223). Site-search RBCO studies show that muons localize and probe in locations away from the superconducting CuO2 planes. Maximum entropy (MaxEnt, ME) analysis of transverse field [Formula: see text] data of [Formula: see text] (GdBCO) indicates that the muon probes in an undisturbed insulating environment, allowing [Formula: see text] to detect (weak) magnetic features in these cuprates. Concerning Varma’s predicted loop currents, MaxEnt has shown weak [Formula: see text] signals for GdBCO in zero field above and below the critical temperature, [Formula: see text]; these are near the predicted [Formula: see text] Oe. Concerning Zhang’s predicted antiferromagnetism (AF) connected to the vortex cores, we have observed Lorentzian relaxation of cuprate vortex signals below half [Formula: see text], consistent with AF-broadening effects. For both Bi2212 and Tl2223, Lorentzians describe the [Formula: see text] vortex signals much better below [Formula: see text] than Gaussians, indicating that extra AF fields occur near and in the vortex cores. In sum, both our MaxEnt-[Formula: see text] (ME-[Formula: see text]) studies point toward magnetic roots of cuprate superconductivity.


2010 ◽  
Vol 82 (9) ◽  
Author(s):  
Oren Ofer ◽  
Yutaka Ikedo ◽  
Tatsuo Goko ◽  
Martin Månsson ◽  
Jun Sugiyama ◽  
...  

1999 ◽  
Vol 311 (1-2) ◽  
pp. 19-22 ◽  
Author(s):  
C.E. Stronach ◽  
D.R. Noakes ◽  
X. Wan ◽  
Ch. Niedermayer ◽  
C. Bernhard ◽  
...  

1992 ◽  
Vol 114 (1-2) ◽  
pp. 176-178 ◽  
Author(s):  
D.R. Noakes ◽  
E. Fawcett ◽  
E.J. Ansaldo ◽  
C. Niedermayer ◽  
C.E. Stronach

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