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Combinatorial study of Fe-Co-V hard magnetic thin films
Sean W Fackler1, Vasileios Alexandrakis2, Dennis König2
1Department of Materials Science & Engineering, University of Maryland, College Park, MD, USA.
Science and Technology of Advanced Materials
|May 2, 2017
Summary
This study explores magnetic and structural properties of Fe-Co-V thin films using combinatorial sputtering. Researchers found significant differences in magnetic coercivity between in-plane and out-of-plane orientations, influenced by film thickness and composition.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Thin Film Technology
Background:
- Fe-Co-V alloys are of interest for magnetic applications.
- Understanding the relationship between composition, thickness, and magnetic properties is crucial for material design.
- High-throughput methods enable rapid screening of material properties.
Purpose of the Study:
- To investigate the magnetic and structural properties of Fe-Co-V thin film libraries.
- To explore the effects of composition and thickness on magnetic behavior.
- To compare high-throughput characterization with traditional methods.
Main Methods:
- Combinatorial sputtering for fabricating Fe-Co-V thin film libraries.
- High-throughput characterization including synchrotron X-ray diffraction, magnetometry, composition, and thickness measurements.
- Electron microscopy for observing grain structure.
Main Results:
- In-plane hysteresis loops showed a coercive field of 23.9 kA/m and magnetization of 1000 kA/m.
- Out-of-plane measurements revealed significantly enhanced coercive fields (207 kA/m) attributed to shape anisotropy.
- Magnetization reversal is governed by 180° domain wall pinning.
- High-throughput magneto-optical Kerr effect (MOKE) and vibrating sample magnetometry (VSM) showed agreement in trends.
Conclusions:
- Fe-Co-V thin films exhibit distinct magnetic properties influenced by orientation and microstructure.
- Combinatorial sputtering and high-throughput methods are effective for studying wide ranges of composition and thickness.
- Shape anisotropy plays a key role in the enhanced out-of-plane coercivity.
Keywords:
203 Magnetics / Spintronics / Superconductors306 Thin film / Coatings50 Energy MaterialsVicalloycombinatorial thin filmhigh-throughputpermanent magnetMore Related Videos
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