Master of Science (M.S.)
Degree Granting Department
Hariharan Srikanth, Ph.D.
Manh-Huong Phan, Ph.D.
William G. Matthews, Ph.D.
Complex oxides, Frustration, Magnetism, Spin Glass
Complex oxides represent an intersection of play grounds for the existence of exciting new fundamental physics and materials with potential technological implications. The realization of many exciting properties of these systems rely on the coupling of electronic, structural and magnetic degrees of freedom. Additionally, competing interactions within each type of coupling discussed previously lead to theoretically diverse ground states, which under the application of an external perturbation, can be tuned and probed.
Ca3Co¬2-xMnxO6 represent a quasi-one dimensional Ising spin chain system oriented in an antiferromagnetic triangular lattice. The exotic behavior of the undoped compound Ca3Co2O6 has inspired work on continuing the fundamental understanding of frustrated magnetic systems. Through chemical doping of Manganese ions, the magnetic properties, namely the exotic spin glass like behavior can be enhanced for a modest doping range of x
The effects of particle dimensionality were probed through the application of varied calcining conditions as to attempt to observe the altering of magnetic properties, mainly the out of equilibrium magnetization plateaus observed in Ca3Co1.75 Mn0.25O6. It appears that within the particle sizes studied the magnetic behavior is highly robust, even considering the inclusion of ionic disorder.
Scholar Commons Citation
Casas, Brian Wesley, "Effects of disorder and low dimensionality on frozen dynamics in Ca3Co2-xMnxO6" (2015). Graduate Theses and Dissertations.