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Dilution of the Near-Kagome Compound Vesignieite
Vesignieite, Cu3VBa2O8(OH)2, is one of very few materials approximating a kagome spin-1/2 Heisenberg antiferromagnet, a model that is the ideal setting for novel quantum spin... -
The Crossover Between Giant Magnetoresistance and Superconductivity in RuSr2G...
Giant magnetoresistance (GMR) is observed up to -49% in RuSr2R1.8-xY0.2CexCu2O10-d ruthenocuprates. The magnetotransport is very sensitive to lattice effects. As , the mean A... -
Muon spin rotation study on Pr2T3Ge5 (T = Rh and Pd)
Recently we have investigated Pr2Pd3Ge5 and Pr2Rh3Ge5 compounds which form in the orthorhombic structure. Pr2Pd3Ge5 exhibits two magnetic transitions at TN1 = 7.5 K and TN2 =... -
Study of multiple magnetic ordering transitions in Ce3Ir4Sn13 using µSR
The cubic compound Ce3Ir4Sn13 shows complex step-like magnetic ordering at 2.1K and 0.6K in the heat capacity (also at 2.18K) and Hall effect. The 2.1K transition is furthermore... -
Spin dynamics in Sn-doped Er2Ti2-xSnxO7: probing the putative quantum critica...
The frustrated pyrochlore Er2Ti2O7 is a rare example of a magnetic system in which quantum fluctuations are capable of selecting a unique ground state out of the macroscopically... -
Probing the superconducting state of the non-centrosymmetric Heusler supercon...
Recently, superconductivity has been discovered in a number of materials whose lattices lack inversion symmetry, with important implications for the symmetry of the... -
Probing lithium diffusion in olivine materials LiMPO4 using muSR
We can trace the history of electrochemical cells just over two hundred years back to Luigi Galvani and Alessandro Volta¿s inventions, and perhaps more than a millennium further... -
Investigation of magnetic defects in exfoliated and ball-milled graphite
The recent interest in carbon-based materials like graphene stimulated a deeper analysis of the magnetism in graphite defects. In a previous µSR experiment we observed an... -
Exploring magnetic fluctuations in a novel iridate pyrochlore: Bi2Ir2O7
Pyrochlore magnets are one of the cornerstones of frustrated magnetism, with two interpenetrating lattices of corner-sharing tetrahedra on which magnetic ions can be placed. By... -
Study of Time Reversal Symmetry breaking in Non-Centrosymmetric Superconducto...
We propose to investigate the effects of the electron- phonon interaction on the time reversal symmetry breaking phenomenon of non-cetrosymmetric superconductors. μSR is... -
muSR study on non-centrosymmetric Ce-based heavy fermion superconductors: CeT...
Recently a handful of non-centrosymmetric Ce-based HF compounds with general formula CeTX3 (T=transition mental and X=Si or Ge) have been reported to exhibit superconductivity... -
muSR study of the heavy fermion antiferromagnetic superconductor CeNi0.8Bi2
Recently the coexistence of superconductivity (SC) and antiferromagnetic (AFM) ordering has been reported in CeNi0.8Bi2 with TSC = 4.2 K and TN =5 K, which crystallises in the... -
Magnetic correlations in yttrium diluted Ho2-xYxTi2O7 spin ice.
Pure Ho2Ti2O7 exhibits spin ice beahviour. Studies of doped spin ice, replacing Ho with non-magnetic Y, suggest that the spin ice state is present even when the amount of doping... -
Search for spin freezing and magnetic order in a frustrated cluster magnet
LiZn2Mo3O8 is a highly unusual geometrically frustrated material: the magnetic moments are associated not with single ions but with small transition-metal clusters. The spin is... -
Kagome quantum spin liquids - The case of Vesignieite
We aim to explore the groundstate of a new near-perfect S=1/2 kagome antiferromagnetic (KAFM) system using MuSR at the lowest possible temperatures. The title compound is... -
Moment stability and spin fluctuations in ferromagnetic Au4V
Au4V is an extremely unusual alloy. Neither Au nor V is generally found to carry a magnetic moment in the metallic state, yet the body-centred tetragonal (bct), structurally... -
Critical behaviour and FmuF oscillations in Cs2Cu3SnF12 and Rb2Cu3SnF12
Cs2Cu3SnF12 and Rb2Cu3SnF12 have a distorted kagome structure and the latter exhibits a pinwheel valence bond solid (VBS) state that has been demonstrated by inelastic neutron... -
A µSR STUDY OF THE SUPERCONDUCTING GROUD STATE OF LA3NI2B2N3-d
The quaternary boronitride superconductor La3Ni2B2N3-d (Tc~12-14 K) has a layered structure where LaN-LaN-LaN triple layer blocks alternate with NiB layers. These NiB sheets are... -
Quantum spin liquids in a frustrated spin chain
LiCuSbO4 is a new 1D S =1/2 frustrated chain compound. Chains with frustrated ferromagnetic J1 and antiferromagnetic J2 interactions are of significant interest due to the rich... -
Quasi two-dimensional molecular layers separated by magnetic and non-magnetic...
One goal of our research into the nanoengineering of molecular magnets is a detailed understanding of the relationship between the structure and composition of a system and its...