Open Access Honors Program Thesis
Nanostructured materials--Magnetic properties; Order-disorder in alloys; Gadolinium; Melt spinning;
As nanoscale science continues to flourish, scientists strive to understand how structure and order (or disorder) on the nanoscale contribute to macroscopic properties, such as magnetism. This study examines alloys of gadolinium and iron that have been nanostructured through the process of melt-spinning. The result was a two-part system consisting of small (~70 nm) gadolinium grains surrounded by an amorphous gadolinium and iron matrix. Measurements of the samples’ DC magnetization and AC susceptibility were performed. By looking at the paramagnetic to ferromagnetic transition in the materials, the critical exponents were obtained and used to classify and understand how the addition of iron and the melt-spinning process affected the magnetic properties. By using relatively simple magnetic atoms, we intend for this study to be a fundamental look at disorder on the nanoscale and a model system for future investigations.
Year of Submission
University Honors Designation
A thesis submitted in partial fulfillment of the requirements for the designation University Honors
© 2008 Justin Gary Bohnet
Bohnet, Justin Gary, "Effects of nanoscale disorder on the paramagnetic to ferromagnetic transition in melt-spun gadolinium and gadolinium iron alloys" (2008). Honors Program Theses. 11.