Daniel Kiphart, Gabriel David Chaves O'Flynn, Feliks Stobiecki, Łukasz Frąckowiak, Michał Matczak, Piotr Kuświk
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引用次数: 0
Abstract
The presence of two magnetic sublattices in ferrimagnetic rare-earth-transition metal alloys enables the tuning of their magnetic properties by adjusting the film composition (e.g., magnetization, coercivity, as well as compensation and Curie temperatures). Using both experimental techniques and atomistic simulations, the magnetic properties of Co/(Tb-Co) bilayers are studied across a broad range of parameters, including the thicknesses of the two layers and the composition of the alloy layer. This work demonstrates the ability to precisely modify the compensation point of Tb-Co alloy thin films by adding a Co underlayer with a specified thickness. Furthermore, the range of parameters are identified for which the magnetization reversal of the alloy and Co layers occurs synchronously and provides a simple expression for calculating the effective composition of the bilayer system. Additionally, it is shown that an exchange-spring magnet behavior can emerge when the alloy is Tb-dominant and the Co underlayer thickness exceeds a critical threshold. It is also demonstrated that for Tb concentrations where the alloy layer is expected to be paramagnetic, the exchange coupling with the Co layer locally induces ferrimagnetic order near the interface, leading to a second transition back to Co dominance.
期刊介绍:
Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018.
The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface.
Advanced Materials Interfaces covers all topics in interface-related research:
Oil / water separation,
Applications of nanostructured materials,
2D materials and heterostructures,
Surfaces and interfaces in organic electronic devices,
Catalysis and membranes,
Self-assembly and nanopatterned surfaces,
Composite and coating materials,
Biointerfaces for technical and medical applications.
Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.