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Magneto-structural correlations in a systematically disordered B2 lattice

التفاصيل البيبلوغرافية
العنوان: Magneto-structural correlations in a systematically disordered B2 lattice
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
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/ab944a