Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/33963
Title: | Strontium ferromolybdate-based magnetic tunnel junctions |
Author: | Suchaneck, Gunnar Artiukh, Evgenii Sobolev, Nikolai A. Telesh, Eugene Kalanda, Nikolay Kiselev, Dmitry A. Ilina, Tatiana S. Gerlach, Gerald |
Keywords: | Magnetic tunnel junction Strontium ferromolybdate Tunnel barrier material Surface roughness Interface layers Tunnel magnetoresistance |
Issue Date: | 1-Mar-2022 |
Publisher: | MDPI |
Abstract: | Thin-film strontium ferromolybdate is a promising material for applications in room-temperature magnetic tunnel junction devices. These are spin-based, low-power-consuming alternatives to CMOS in non-volatile memories, comparators, analog-to-digital converters, and magnetic sensors. In this work, we consider the main tasks to be solved when creating such devices based on strontium ferromolybdate: (i) selecting an appropriate tunnel barrier material, (ii) determining the role of the interface roughness and its quantification, (iii) determining the influence of the interface dead layer, (iv) establishing appropriate models of the tunnel magnetoresistance, and (v) promoting the low-field magnetoresistance in (111)-oriented thin films. We demonstrate that (i) barrier materials with a lower effective electronegativity than strontium ferromolybdate are beneficial, (ii) diminution of the magnetic offset field (the latter caused by magnetic coupling) requires a wavy surface rather than solely a surface with small roughness, (iii) the interface dead-layer thickness is of the order of 10 nm, (iv) the tunnel magnetoresistance deteriorates due to spin-independent tunneling and magnetically disordered interface layers, and (v) antiphase boundaries along the growth direction promote the negative low-field magnetoresistance by reducing charge carrier scattering in the absence of the field. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/33963 |
DOI: | 10.3390/app12052717 |
Publisher Version: | https://www.mdpi.com/2076-3417/12/5/2717 |
Appears in Collections: | DFis - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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applsci-12-02717-v2.pdf | 1.12 MB | Adobe PDF | View/Open |
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