Interface induced magnetic properties of Gd/Co heterostructures

Antiferromagnetic coupling between rare-earth and transition metal ferromagnetic layers gives rise to various magnetic ground states in heterostructures of these materials. Interface structure and morphology tend to play important roles in magnetic properties of such systems. Interface induced magne...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2018, Vol.20 (33), p.21580-21589
Main Authors: Basha, M A, Prajapat, C L, Gupta, M, Bhatt, Harsh, Kumar, Yogesh, Ghosh, S K, Karki, V, Basu, S, Singh, Surendra
Format: Article
Language:English
Subjects:
Annealing
Antiferromagnetism
Correlation analysis
Ferromagnetism
Gadolinium
Heterostructures
High vacuum
Interfacial properties
Magnetic properties
Magnetism
Magnetization
Magnetron sputtering
Morphology
Multilayers
Rare earth elements
Reflectometry
Secondary ion mass spectrometry
Structural analysis
Twisting
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Summary:Antiferromagnetic coupling between rare-earth and transition metal ferromagnetic layers gives rise to various magnetic ground states in heterostructures of these materials. Interface structure and morphology tend to play important roles in magnetic properties of such systems. Interface induced magnetization in Gd/Co heterostructures has been studied using a combination of structural and magnetic characterization techniques. The interface morphology of the Gd/Co system was varied by growing Gd/Co multilayers using magnetron sputtering under different argon partial pressures. Interfacial properties were further modified by annealing the multilayers under high vacuum. The macroscopic magnetization measurements have been correlated with depth dependent structure and magnetic properties of multilayers studied using X-ray and polarized neutron reflectometry techniques. Secondary ion mass spectrometry measurements from both as-deposited and annealed samples also confirmed modification at the interfaces. It has been shown that the interface structure, together with roughness, leads to a unique low-temperature magnetic phase characterized by twisting of Gd and Co moments.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp02909a