213 citations · 1.1k across the 27 of their papers we have counts for
27 papers
Experimental determination of the spin Hamiltonian of the cubic chiral magnet MnSi
P. Dalmas de Reotier, A. Yaouanc, G. Lapertot +3
A thorough description of the physics of a magnetic compound requires the validation of its microscopic spin Hamiltonian. Here, from the analysis of muon-spin rotation spectra reco…
Power-law dynamics in the spin-liquid kagome lattices SrCr8Ga4O19 and ZnCu3(OH)6Cl2
P. Dalmas de Reotier, A. Yaouanc
We consider the polarization function P^{exp}_Z(t) measured by the muon-spin relaxation (muSR) technique for the SrCr8Ga4O19 and ZnCu3(OH)6Cl2 spin-liquid systems. We show the func…
Field induced phase diagram of the XY pyrochlore antiferromagnet ErTiO
E. Lhotel, J. Robert, E. Ressouche +9
We explore the field-temperature phase diagram of the XY pyrochlore antiferromagnet ErTiO, by means of magnetization and neutron diffraction experiments. Depending on t…
A novel type of splayed ferromagnetic order observed in Yb2Ti2O7
A. Yaouanc, P. Dalmas de Reotier, L. Keller +2
The pyrochlore insulator Yb2Ti2O7 has attracted the attention of experimentalists and theoreticians alike for about 15 years. Conflicting neutron diffraction data on the possible e…
Nd2Sn2O7: an all-in-all-out pyrochlore magnet with no divergence-free field and anomalously slow paramagnetic spin dynamics
A. Bertin, P. Dalmas de Reotier, B. Fak +9
We report measurements performed on a polycrystalline sample of the pyrochlore compound Nd2Sn2O7. It undergoes a second order magnetic phase transition at Tc ~ 0.91 K to a noncopla…
Evidence for unidimensional low-energy excitations as the origin of persistent spin dynamics in geometrically frustrated magnets
A. Yaouanc, P. Dalmas de Reotier, A. Bertin +4
We report specific heat, magnetic, and muon spin relaxation measurements performed on a polycrystalline sample of the normal spinel CdHo2S4. The rare-earth ions sit on a lattice of…
Anomalously slow spin dynamics and short-range correlations in the quantum spin ice systems Yb2Ti2O7 and Yb2Sn2O7
A. Maisuradze, P. Dalmas de Reotier, A. Yaouanc +3
We report a positive muon spin relaxation and rotation (\muSR) study of the quantum spin ice materials Yb2Ti2O7 and Yb2Sn2O7 focusing on the low field response. In agreement with e…
Evidence for Coexistence of Bulk Superconductivity and Itinerant Antiferromagnetism in the Heavy Fermion System CeCo(InCd)
Ludovic Howald, Evelyn Stilp, Pierre Dalmas de Réotier +6
In the generic phase diagram of heavy fermion systems, tuning an external parameter such as hydrostatic or chemical pressure modifies the superconducting transition temperature. Th…
Mesoscopic correlations in Tb2Ti2O7 spin liquid
S. Guitteny, I. Mirebeau, P. Dalmas de Réotier +6
We have studied the spin correlations with = (, , ) propagation vector which appear below 0.4\, K in \tbti\ spin liquid by combining powder neutr…
Low temperature crystal structure and local magnetometry for the geometrically frustrated pyrochlore Tb2Ti2O7
P. Dalmas de Reotier, A. Yaouanc, A. Bertin +6
We report synchrotron radiation diffraction and muon spin rotation (muSR) measurements on the frustrated pyrochlore magnet Tb2Ti2O7. The powder diffraction study of a crushed cryst…
New insights for the description of magnetic correlations inferred from muSR
P. Dalmas de Reotier, A. Yaouanc, A. Maisuradze
Whenever a compound exhibits a spontaneous muSR oscillation, long-range magnetic ordering is usually inferred. Here we show that some caution is required. The coherence length need…
Core-shell nanostructure in a Ge_0.9Mn_0.1 film from structural and magnetic measurements
P. Dalmas de Reotier, E. Prestat, P. Bayle-Guillemaud +8
We have characterized a film of Ge_0.9Mn_0.1 forming self-organized nanocolumns perpendicular to the Ge substrate with high resolution scanning transmission electron microscopy com…
Understanding the SR spectra of MnSi without magnetic polarons
A. Amato, P. Dalmas de Réotier, D. Andreica +8
Transverse-field muon-spin rotation (SR) experiments were performed on a single crystal sample of the non-centrosymmetric system MnSi. The observed angular dependence of the muo…
Spin dynamics and spin freezing in the triangular lattice antiferromagnets FeGa2S4 and NiGa2S4
Songrui Zhao, P. Dalmas de R/'eotier, A. Yaouanc +6
Magnetic susceptibility and muon spin relaxation (muSR) experiments have been carried out on the quasi-2D triangular-lattice spin S = 2 antiferromagnet FeGa2S4. The muSR data indic…
Evidence for an exotic magnetic transition in the triangular spin system FeGa2S4
P. Dalmas de Reotier, A. Yaouanc, D. E. MacLaughlin +8
We report positive muon spin relaxation measurements on the triangular lattice magnetic system FeGa2S4. A magnetic transition not previously detected by specific heat and magnetic…
Low-temperature magnetization in geometrically frustrated Tb2Ti2O7
E. Lhotel, C. Paulsen, P. Dalmas de Réotier +3
The nature of the low temperature ground state of the pyrochlore compound Tb2Ti2O7 remains a puzzling issue. Dynamic fluctuations and short-range correlations persist down to 50 mK…
Absence of magnetic phase separation in MnSi under pressure
D. Andreica, P. Dalmas de Reotier, A. Yaouanc +2
We report muon spin spectroscopy data (muSR) obtained under hydrostatic pressure on a large single crystal of the itinerant helimagnet MnSi, and recorded down to 0.235 K and up to…
Dynamic correlated Cu(2) magnetic moments in superconducting YBa_2(Cu_0.96Co_0.04)_3O_y (y ~ 7)
J. A. Hodges, P. Bonville, A. Yaouanc +3
We have examined the magnetic properties of superconducting YBa_2(Cu_0.96Co_0.04)_3O_y (y ~ 7, T_sc = 65 K) using elastic neutron scattering and muon spin relaxation (muSR) on sing…
Dynamic correlated Cu(2) magnetic moments in superconducting YBa_2(Cu_0.96Ni_0.04)_3O_y (y ~ 7)
J. A. Hodges, P. Bonville, A. Forget +3
We have examined the magnetic properties of polycrystalline, superconducting YBa_2(Cu_0.96Ni_0.04)_3O_y (y ~ 7, T_sc ~ 75 K) using two local probe techniques: 170Yb Moessbauer down…
Evidence for weak itinerant long-range magnetic correlations in UGe2
A. Yaouanc, P. Dalmas de Reotier, P. C. M. Gubbens +4
Positive muon spin relaxation measurements performed on the ferromagnet UGe2 reveal, in addition to the well known localized 5f-electron density responsible for the bulk magnetic p…
Magnetic character of the empty density of states in uranium compounds from X-ray magnetic circurlar dichroism
P. Dalmas de Reotier, A. Yaouanc
We present a discussion of published x-ray magnetic circular dichroism (XMCD) measurements performed at the uranium M_4,5 edges of metallic uranium compounds, focusing on the shape…
First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7
J. A. Hodges, P. Bonville, A. Forget +10
Using neutron diffraction, 170Yb Mossbauer and muSR spectroscopies, we have examined the pyrochlore Yb2Ti2O7 where the Yb3+ S'=1/2 ground state has planar anisotropy. Below ~0.24K,…
Evidence for a two component magnetic response in UPt3
A. Yaouanc, P. Dalmas de Reotier, F. N. Gygax +9
The magnetic response of the heavy fermion superconductor UPt_3 has been investigated on a microscopic scale by muon Knight shift studies. Two distinct and isotropic Knight shifts…
Muon spin rotation and relaxation in magnetic materials
P Dalmas de Reotier, A Yaouanc
A review of the muon spin rotation and relaxation (SR) studies on magnetic materials published from July 1993 is presented. It covers the investigation of magnetic phase diagram…