The low-dimensional magnetic properties of iron(II) phthalocyanine (FePc) thin films are studied as a function of the quasi-one dimensional magnetic chain structures FePc forms when deposited as a thin film. The length of the FePc chains are controlled via deposition temperature in order to study the coercivity dependence on chain length. FePc is sublimated onto silicon substrates to create a series of 100 nm thick FePc thin films deposited at temperatures ranging from 21 °C to 250 °C. The magnetic properties of all thin films are characterized through hysteresis measurements taken at 2:60 K, 3:00 K, 3:50 K, and 4:00 K. A model with reduced dimensions based on single domain spherical particles in the super-paramagnetic regime was developed and applied to describe the coercive behavior of varying FePc chain lengths. The model predicts a lower cutoff chain length of about 15 nm which is the minimum chain length needed for FePc to exhibit hysteresis.
|Commitee:||Ojeda-Aristizabal, Claudia, Peterson, Michael|
|School:||California State University, Long Beach|
|Department:||Physics and Astronomy|
|School Location:||United States -- California|
|Source:||MAI 58/05M(E), Masters Abstracts International|
|Subjects:||Applied physics, Physics|
|Keywords:||Coercivity, Low dimensional, Magnetism, Physics|
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