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Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2
T. Lancaster, S. J. Blundell, P. J. Baker +6
Zero-field muon-spin relaxation measurements of the frustrated triangular quantum magnet AgNiO2 are consistent with a model of charge disproportionation that has been advanced to e…
Muon-fluorine entangled states in molecular magnets
T. Lancaster, S. J. Blundell, P. J. Baker +6
The information accessible from a muon-spin relaxation experiment is often limited since we lack knowledge of the precise muon stopping site. We demonstrate here the possibility of…
Magnetic order in the S=1/2 two-dimensional molecular antiferromagnet, copper pyrazine perchlorate Cu(Pz)_2(ClO_4)_2
T. Lancaster, S. J. Blundell, M. L. Brooks +14
We present an investigation of magnetic ordering in the two-dimensional S=1/2 quantum magnet Cu(Pz)_2(ClO_4)_2 using specific heat and zero field muon-spin relaxation (μ^+SR). The…
Muon-spin relaxation measurements on the dimerized spin-1/2 chains NaTiSi2O6 and TiOCl
P. J. Baker, S. J. Blundell, F. L. Pratt +10
We report muon spin relaxation (muSR) and magnetic susceptibility investigations of two Ti3+ chain compounds which each exhibit a spin gap at low temperature, NaTiSi2O6 and TiOCl.…
Magnetism in Geometrically Frustrated YMnO3 Under Hydrostatic Pressure Studied with Implanted Muons
T. Lancaster, S. J. Blundell, D. Andreica +10
The rare-earth ferroelectromagnet YMnO3 consists of weakly coupled triangular layers of S=2 spins. Below T_N ~ 70 K muon-spin relaxation data show two oscillatory relaxing signals…
Magnetic order in the quasi-one-dimensional spin 1/2 chain, copper pyrazine dinitrate
T. Lancaster, S. J. Blundell, M. L. Brooks +5
We present the first evidence of magnetic order in the quasi-one-dimensional spin 1/2 molecular chain compound, copper pyrazine dinitrate Cu(C4H4N2)(NO3)2}. Zero field muon-spin re…
Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2
P. J. Baker, T. Lancaster, S. J. Blundell +4
We report muon-spin rotation, heat capacity, magnetization, and ac magnetic susceptibility measurements of the layered spin-1/2 antiferromagnet NaNiO2. These show the onset of long…
Unconventional magnetic properties of the weakly ferromagnetic metal BaIrO_3
M. L. Brooks, S. J. Blundell, T. Lancaster +4
We present experimental evidence for small-moment magnetism below the ferromagnetic transition temperature (T_c3 = 183 K) in the quasi-one-dimensional metal BaIrO_3. Further, we id…
Magnetic phase separation in EuB6 detected by muon spin rotation
M. L. Brooks, T. Lancaster, S. J. Blundell +3
We report results of the first muon-spin rotation measurements performed on the low carrier density ferromagnet EuB. The ferromagnetic state is reached via two magnetic transit…