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Magnetic and structural properties of CoFeB thin films grown by pulsed laser deposition

DOI: 10.1088/2053-1591/abc124 DOI Help

Authors: Geet Awana (Loughborough University) , Chris Cox (Loughborough University) , Guru Venkat (Loughborough University) , Kelly Morrison (Loughborough University) , Zhaoxia Zhou (Loughborough University) , Dirk Backes (Loughborough University; Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Research Express , VOL 7

State: Published (Approved)
Published: October 2020
Diamond Proposal Number(s): 23748

Open Access Open Access

Abstract: The emergence of thin film CoFeB has driven research and industrial applications in the past decades, with the magnetic random access memory (MRAM) the most prominent example. Because of its beneficial properties, it fulfills multiple functionalities as information-storing, spin-filtering, and reference layer in magnetic tunnel junctions. In future, this versatility can be exploited beyond the traditional applications of spintronics by combining with advanced materials, such as oxide-based materials. Pulsed laser deposition (PLD) is their predominant growth-method, and thus the compatibility of CoFeB with this growth technique will be tested here. This encompasses a comprehensive investigation of the structural and magnetic propoperties. In particular, we find a substantial 'dead' magnetic layer and confirm that it is caused by oxidation employing the x-ray magnetic circular dichroism (XMCD) effect. The low damping encountered in vector network analyzer-based ferromagnetic resonance (VNA-FMR) renders them suitable for magnonics applications. These findings demonstrate that CoFeB thin films are compatible with emergent, PLD-grown materials, ensuring their relevance for future applications.

Diamond Keywords: Spintronics; Data Storage; Ferromagnetism

Subject Areas: Materials, Physics

Instruments: I06-Nanoscience

Added On: 27/10/2020 09:47


Discipline Tags:

Surfaces Quantum Materials Hard condensed matter - electronic properties Physics Hard condensed matter - structures Electronics Magnetism Materials Science interfaces and thin films

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)