Magnetic Characterization of Diluted Iron Phthalocyanine Thin Films using Co-Deposition*

Phthalocyanine molecules are widely used in applications ranging from photovoltaic devices to gas sensors. In addition to the well-studied electronic and optical properties, iron phthalocyanine (FePc)-based materials exhibit exchange coupling and anisotropic magnetic properties. A unique feature is the formation of quasi-one-dimensional (1D) metal chains. The chain length can be modified through deposition temperature, but also interrupted through co-deposition of metal-free phthalocyanine. This study focuses on synthesizing thin films, where FePc is diluted with its metal-free counterpart phthalocyanine (H₂Pc) to understand the influence of the magnetic relaxation processes in such thin films. We present the magnetic and structural properties of FePc and H₂Pc thin films deposited onto silicon substrates. These measurements provide a scaffolded insight of magnetic properties in co-deposited iron phthalocyanine thin films at temperature between 2 - 20 K.