-
Negative thermal expansion in the rutile phase of ZnF2
It has recently been discovered than the rutile phase of zinc fluoride shows negative thermal expansion along all three crystallographic axes. What is highly unusual about this... -
Proton dynamics in novel organic ferroelectric materials
The vast majority of known ferroelectrics are inorganic compounds such as barium titanate and potassium dihydrogen phosphate. Contrary to naïve expectation, ferroelectricity in... -
Molecular dynamics and melting in CH3NH3PbCl3:
The organic-inorganic perovskites (CH3NH3Pb(Br,Cl,I)3) have been identified as efficient photovoltaic materials. Theoretical calculations have suggested that the low energy... -
Order-disorder and phase transitions in the LiFeO2 cathode materials
Despite the importance of the LiFeO2 phases as cathode materials in lithium ion batteries, little is known about their crystal structures, except that they should be based on... -
Multiferroic (Ferroelastic/Magnetic) Phase Transitions in KMnF3
KMnF3 perovskite undergoes 3 structural, and two magnetic phase transitions on cooling from 300 K to 2 K. Above 185 K the compound is in the aristotype structure, on cooling... -
Aza-crown-stabilized Alkali-Alkalide Systems: Solvent and metal effects on di...
We request 4 days on IRIS to investigate the diffusional and rotational dynamics of the alkalide forming, fully methylated aza-crown hexamethyl-hexacyclen (HMHC) in... -
Atomic structure of formamidinium lead iodide perovskite
New perovskite phases containing lead and halogens with a molecular cation are providing new options for materials in solar cells, giving unusually high efficiencies in... -
Determination of successive magnetic orders of a new honeycomb-based multifer...
Novel functionality in condensed matter physics is one of fastest developing fields, aiming for possible future applications including quantum computing, electronic devices and... -
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... -
In-situ Variable Temperature Studies of Dy Doped BiFeO3
Multiferroics and in particular BiFeO3 have recieved alot of interest. The potential of multiferroic materials to be incorporated into many devices such as sensors and memory... -
The origin of the ferromagnetic behavior in room temperature multiferroics Bi...
The long period cycloid in multiferroic BiFeO3 influences the potential applications of this material and it has been shown that doping (with La and Mn) enlarges the cycloid... -
Local structure study of multiferroic region of cupric(II) oxide
Cupric(II) oxide (CuO) has recently found to be both antiferromagnetic and ferroelectric in temperature region from 213 K to 230 K. This high temperature multiferroic material... -
Structure and phase transitions of Sr3Ru2O7
Sr3Ru2O7 is a layered Ruddlesden-Popper perovskite which displays intriguing behaviour at low temperatures and high magnetic field. It can be tuned close to a quantum critical... -
Multiferroic (Ferroelastic/Magnetic) Phase Transitions in KMnF3
KMnF3 perovskite undergoes 3 structural, and two magnetic phase transitions on cooling from 300 K to 2 K. Above 185 K the compound is in the aristotype structure, on cooling... -
Low-Temperature Structural Phase Transitions in GeV4S8
The defect thiospinel, GeV4S8 adopts a cubic structure at room temperature (space group F-43m). We have identified a new monoclinic phase of this material at 2K, which may be... -
Magnetic structure of heavily Fermion TbxYb1-xAgGe
YbAgGe has an enhanced electronic specific heat coefficient and two magnetic phase transitions at TM1=0.8K and TM2=0.65K. We have grown a series of TbxYb1-xAgGe and YbAgGe... -
Single crystal diffraction as a tool for the interpretation of the phonon spe...
A reliable spectroscopic assignment of the high-frequency proton modes in CsH2PO4 (CDP) is possible only within the framework of the fully ordered proton, low-temperature P21... -
Variable Temperature Study of thallium and caesium azides
This proposal seeks to investigate the effect of temperature on the structures of thallium and caesium azide. High-resolution neutron powder diffraction data are necessary to... -
Magnetic ordering in CaFe3O5 and CaFe5O7
This proposal is to explore the evolution of magnetic ordering in two members of the homologous series CaFe2O4(FeO)n with n = 1, & 3, and to correlation the behaviour of the... -
A Self-consistent Description of the Thermoelastic Properties of Dielectric P...
20 years ago, Anderson proposed that the thermoelastic properties of the dominant (mantle) phase within the Earth, MgSiO3 perovskite, could be described as a simple Debye solid....
