Abstract
We report on the preparation of Gadolinium thin films by means of sputter deposition on Silicon Oxide wafers. A series of samples with different buffer layers and various substrate temperatures has been produced. The film on an amorphous Tantalum buffer deposited at 773 K shows the highest increase of magnetization during the phase transition at the Curie temperature. Further detailed analysis of the magnetic properties has been conducted by VSM.
Highlights
Magnetocaloric materials have attracted a lot of research interest during the last couple of years.[1]
As a preparatory work for a thin film calorimeter which will be addressed in a subsequent publication, we report a structural analysis of Gadolinium films on different buffer layers with Tantalum capping
Afterwards, in particular Gadolinium films on Tantalum buffers were analyzed in more detail and the magnetic properties were evaluated by electrical transport measurement, i.e. anomalous Hall effect (AHE) and vibrating sample magnetometry (VSM)
Summary
Magnetocaloric materials have attracted a lot of research interest during the last couple of years.[1]. The measurement of the adiabatic temperature change is quite challenging for these thin film samples. Gadolinium is an excellent material for this purpose since its magneto-caloric properties are wellknown in bulk material[3] and its ability for cooling application has been shown.[2] Even though first approaches to measure the adiabatic temperature change on 1.4 μm thick films of Gd have been reported,[4] to the best of the authors’ knowledge, there has been no systematic study on the growth condition of Gadolinium. Afterwards, in particular Gadolinium films on Tantalum buffers were analyzed in more detail and the magnetic properties were evaluated by electrical transport measurement, i.e. anomalous Hall effect (AHE) and vibrating sample magnetometry (VSM)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
