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Element-specific magnetization curves and crossover in Co/Cu/Ni/Cu(001) trilayers studied by XMCD
A Scherz1, F Wilhelm, P Poulopoulos
1Institut für Experimentalphysik, Freie Universität Berlin, Germany.
Journal of Synchrotron Radiation
|August 22, 2001
Summary
We studied Co/Cu/Ni trilayers, observing how interlayer coupling affects nickel magnetization as temperature changes. A gradual rotation of nickel
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Understanding interlayer coupling in magnetic multilayers is crucial for spintronic device applications.
- The magnetic ordering temperatures of individual layers significantly influence multilayer behavior.
Purpose of the Study:
- To investigate the impact of interlayer coupling on the temperature-dependent magnetization curves of Ni in Co/Cu/Ni trilayers.
- To analyze the rotation of Ni magnetization due to differing Cobalt (Co) and Nickel (Ni) ordering temperatures.
Main Methods:
- Element-specific X-ray Magnetic Circular Dichroism (XMCD) measurements.
- Temperature-dependent magnetization (M(T)) curve analysis.
- Fabrication of Co/Cu/Ni trilayers with specific layer thicknesses (1.3 ML Co, 4 ML Ni).
Main Results:
- Observed distinct ordering temperatures: T(C)(Co) ~90 K and T(C)(Ni) ~180 K.
- Demonstrated a crossing of M(T) curves, leading to a rotation of Ni remanent magnetization.
- Recorded gradual angular changes in sublayer magnetization attributed to coupling and anisotropy competition.
Conclusions:
- Interlayer coupling plays a key role in shaping Ni magnetization behavior in Co/Cu/Ni systems.
- The competition between magnetic coupling and anisotropy dictates magnetization rotation with temperature.
- Findings provide insights into designing magnetic multilayers with tailored temperature-dependent properties.