دورية أكاديمية
Magneto-structural correlations in a systematically disordered B2 lattice
العنوان: | Magneto-structural correlations in a systematically disordered B2 lattice |
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المؤلفون: | Jonathan Ehrler, Biplab Sanyal, Jörg Grenzer, Shengqiang Zhou, Roman Böttger, Benedikt Eggert, Heiko Wende, Jürgen Lindner, Jürgen Fassbender, Christoph Leyens, Kay Potzger, Rantej Bali |
المصدر: | New Journal of Physics, Vol 22, Iss 7, p 073004 (2020) |
بيانات النشر: | IOP Publishing, 2020. |
سنة النشر: | 2020 |
المجموعة: | LCC:Science LCC:Physics |
مصطلحات موضوعية: | phase transitions, disorder, ion beam modifications, magneto-structural effects, Science, Physics, QC1-999 |
الوصف: | Ferromagnetism in certain B2 ordered alloys such as Fe _60 Al _40 can be switched on, and tuned, via antisite disordering of the atomic arrangement. The disordering is accompanied by a ∼1 % increase in the lattice parameter. Here we performed a systematic disordering of B2 Fe _60 Al _40 thin films, and obtained correlations between the order parameter ( S ), lattice parameter ( a _0 ), and the induced saturation magnetization ( M _s ). As the lattice is gradually disordered, a critical point occurs at 1 − S = 0.6 and a _0 = 2.91 Å, where a sharp increase of the M _s is observed. DFT calculations suggest that below the critical point the system magnetically behaves as it would still be fully ordered, whereas above, it is largely the increase of a _0 in the disordered state that determines the M _s . The insights obtained here can be useful for achieving tailored magnetic properties in alloys through disordering. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1367-2630 |
Relation: | https://doaj.org/toc/1367-2630 |
DOI: | 10.1088/1367-2630/ab944a |
URL الوصول: | https://doaj.org/article/1277a6af34fe4151ae2228a9a6150100 |
رقم الأكسشن: | edsdoj.1277a6af34fe4151ae2228a9a6150100 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 13672630 |
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DOI: | 10.1088/1367-2630/ab944a |