Sinclair, J. ; Hirohata, A. ; Vallejo-Fernandez, G. ; Meinert, M. ; O'Grady, K. (2019)
Thermal Stability of Exchange Bias Systems Based on MnN.
In: Journal of Magnetism and Magnetic Materials, 476
doi: 10.1016/j.jmmm.2018.12.018
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
At the present time there is a requirement to identify new antiferromagnetic alloys or compounds which might be suitable for the production of exchange bias systems. The phenomenon of exchange bias remains crucial for the operation of all read heads in hard disk drives and also has potential for use in magnetic random access memory (MRAM) systems. There is also an increasing interest in the use of antiferromagnets themselves in spintronic devices. Generally for applications the alloy IrMn is used, however given that Iridium is one of the rarest, and therefore most expensive elements on Earth, there is a search for alternative materials. In this paper we report on a study of the compound MnN in terms of its thermal stability. We have produced polycrystalline films of this compound with sub 10 nm grains and examined the thermal stability in layers of thicknesses of up to 30 nm. Using thermal activation studies we have determined a room temperature value of the anisotropy constant of this compound in a tetragonal structure of up to (6.3 ± 0.3) × 106 erg/cm3. The antiferromagnetic grains can be aligned by thermal annealing at an optimum temperature of 380 K. Above this temperature the magnetic properties deteriorate possibly due to nitrogen desorption.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Sinclair, J. ; Hirohata, A. ; Vallejo-Fernandez, G. ; Meinert, M. ; O'Grady, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermal Stability of Exchange Bias Systems Based on MnN |
| Sprache: | Englisch |
| Publikationsjahr: | 15 April 2019 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Magnetism and Magnetic Materials |
| Jahrgang/Volume einer Zeitschrift: | 476 |
| DOI: | 10.1016/j.jmmm.2018.12.018 |
| Kurzbeschreibung (Abstract): | At the present time there is a requirement to identify new antiferromagnetic alloys or compounds which might be suitable for the production of exchange bias systems. The phenomenon of exchange bias remains crucial for the operation of all read heads in hard disk drives and also has potential for use in magnetic random access memory (MRAM) systems. There is also an increasing interest in the use of antiferromagnets themselves in spintronic devices. Generally for applications the alloy IrMn is used, however given that Iridium is one of the rarest, and therefore most expensive elements on Earth, there is a search for alternative materials. In this paper we report on a study of the compound MnN in terms of its thermal stability. We have produced polycrystalline films of this compound with sub 10 nm grains and examined the thermal stability in layers of thicknesses of up to 30 nm. Using thermal activation studies we have determined a room temperature value of the anisotropy constant of this compound in a tetragonal structure of up to (6.3 ± 0.3) × 106 erg/cm3. The antiferromagnetic grains can be aligned by thermal annealing at an optimum temperature of 380 K. Above this temperature the magnetic properties deteriorate possibly due to nitrogen desorption. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) > Neue Materialien Elektronik |
| Hinterlegungsdatum: | 14 Jan 2022 10:36 |
| Letzte Änderung: | 14 Jan 2022 10:36 |
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