Hazar Salama
PhD Student
Telephone: +61 2 6268 8764
Fax: +61 2 6268 8786
Email: h.salama@student.adfa.edu.au
Location: PEMS Sth, Rm G37
Field of Study - Advanced Materials
Supervisor: Assoc. Prof. Glen Stewart
Co-Supervisor: Dr Wayne Hutchison
Research Topic - Structural and magnetic properties of heavy rare earth manganites
The multi-ferroic properties of the heavy rare earth manganites, with the composition RMn03, are currently under intense scrutiny. These materials are both ferromagnetic and ferroelectric in the same phase, resulting in higher-order magnetoelectric effects and complex phase diagrams at low temperature. Hazar's PhD project examines the transition of RMn03 R=Yb, Tm from the orthorhombic perovskite (o) to the hexagonal (h) phase by high pressure synthesis, the structure and magnetic interactions of both orthorhombic (o) and hexagonal (h) phases and how this affects their magnetic properties. The techniques of 169Tm-, 170Yb- and 57Fe- M?ssbauer spectroscopy are used to investigate the local magnetic moments and crystal field interactions. The M?ssbauer spectroscopy investigations are complemented by magnetic susceptibility and specific heat measurements.