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Giant spin fluctuations and their effect on the first order magnetic transiti...
A giant enhancement of the heat capacity in La(Fe13-xSix) indicates the presence of large spin fluctuations at the paramagnetic to ferromagnetic phase transition. The nature of... -
Variable Temperature Studies of the Novel Multiferroic Tetragonal Tungsten Br...
Recently there has been a renaissance in the investigation of materials which simultaneously exhibit magnetic and electric ordering with these materials expected to find... -
Spectroscopic Studies of RDX and HMX
The aim of this proposal is to measure inelastic neutron spectra using the TOSCA instrument for a series of samples of the widely used secondary explosives RDX and HMX. During a... -
Spectroscopic Studies of Energetic Materials
The aim of this proposal is to measure inelastic neutron spectra using the TOSCA instrument for a selection of energetic materials including some polymorphs of HMX, CL-20, and... -
Magnetostriction in (Bi,La) orthoferrites
We have recently observed unusual magnetostrictive behaviour in Bi0.5La0.5FeO3 (BLFO), a phenomenon which is not present in either solid solution end member. This proposal seeks... -
Structure Solution of the High-Pressure Polymorphs of Hydroxylamine
This proposal requests the allocation of six days beamtime on PEARL to collect neutron powder diffraction data suitable for the structure solution of phases II and III of... -
Phase diagram of the lead-free ferroelectric Na1-xKxNbO3 at room temperature
The system NaNbO3 ¿ KNbO3 is one of the most widely studied as a ¿green¿ replacement for the piezoelectric material PZT (PbZr1-xTixO3). Despite its enormously growing... -
Investigation of the multiferroic materials Ba3Dy2GaNb9O30 and Ba3.5Dy2Ga1.5N...
We have recently performed a ZF muon experiment on Ba3Dy2GaNb9O30 in EMU under the influence of electric fields and demonstrated that this material demonstrates multiferroic... -
Structural Phase Diagram of the new Multiferroic Hexagonal YbFeO3
This experiment aims to map out the structural phase diagram of the new multiferroic compound hexagonal-YbFeO3 as a function of temperature, both above and below room... -
Subtle magnetic phase transitions in multiferroic BiFeO3
This experiment seeks to probe the magnetic structure of multiferroic BiFeO3 and its evolution on lowering temperature, with the specific aim of identifying magneto-structural... -
Thermal and spin currents: making them work for us
The spin Seebeck effect is a newly discovered phenomenon that if harnessed, could result in a significant improvement of the efficiency of thermoelectric energy generators. In... -
Direct measurement of magnetoelectric coupling - a new room temperature multi...
We have recently performed muon measurements on a member of a new class of multiferroic materials. We have shown that there is hysteretic behaviour to the internal field... -
Structural phase diagram of rare earth substituted multiferroic BiFeO3
BiFeO3 is one of the most widely studied multiferroics (ferroelectric TC ~ 830°C, and antiferromagnetic TN ~ 370°C). Rare earth doping has been shown to be a suitable method of... -
Local structural effects in doped NaNbO3 ferroelectrics
Derivatives of the perovskite NaNbO3 are currently being studied as benign replacements for piezoelectric Pb(Zr,Ti)O3. In order to understand the structure-composition-property... -
Magnetostriction in (Bi, La)-orthoferrites
We have recently observed unusual magnetostrictive behaviour in Bi0.5La0.5FeO3 (BLFO), a phenomenon which is not present in either solid solution end member. This proposal seeks... -
Giant magneto-elastic interactions and changes in the phonon spectrum of CoMnSi
Neutrons are almost never used to examine the role of phonons in materials with large magnetocaloric effects, despite the large magneto-elastic coupling often exhibited by them.... -
Structural phase diagram of rare earth substituted multiferroic BiFeO3 - revi...
BiFeO3 is the most widely studied multiferroic and rare earth doping overcomes problems associated with phase metastability and leakage which have hampered applications. We... -
High Resolution Powder Diffraction of Manganites to Determine Bond Lengths as...
Manganites show promise as magnetocaloric materials - for use in solid-state refrigeration - in terms of cost, durability and tunable thermal conductivity. By tuning the...
