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Magnetic field-dependent shape anisotropy in small patterned films studied using rotating magnetoresistance
Xiaolong Fan1, Hengan Zhou1, Jinwei Rao1
1The Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Tianshui South Road 222, 730000 Lanzhou, People's Republic of China.
Scientific Reports
|November 14, 2015
Summary
Shape anisotropy in cobalt (Co) microstrips depends on both shape and magnetization distribution under magnetic fields. This study visualizes how non-uniform magnetization impacts anisotropy constants, aiding in designing micro- and nano-scale ferromagnetic devices.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Shape anisotropy is a critical property of ferromagnetic materials.
- Understanding magnetization distribution is key for controlling magnetic properties.
- Co microstrips are relevant for spintronic devices.
Purpose of the Study:
- To systematically investigate the shape anisotropy of cobalt (Co) microstrips.
- To determine the influence of applied magnetic fields on magnetization distribution and anisotropy.
- To visualize the effect of non-uniform magnetization on anisotropy constants.
Main Methods:
- Electric rotating magnetoresistance measurements.
- Micro-magnetic simulations.
- Analysis of anisotropy constants (K1 and K2).
Main Results:
- Shape anisotropy is dependent on both the microstrip's shape and its magnetization distribution.
- Applied magnetic fields control magnetization distribution, altering shape anisotropy.
- Non-uniform magnetization significantly affects the values and polarities of K1 and K2 anisotropy constants.
Conclusions:
- The study provides a visualized understanding of how non-uniform magnetization influences shape anisotropy in Co microstrips.
- Results are crucial for designing and optimizing micro- and nano-scale patterned ferromagnetic units.
- Findings contribute to understanding the performance of related magnetic devices.
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