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Pressure effect on the order-disorder transformation in L1 0 FeNi
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- Tian, Li-Yun (författare)
- Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden; Division of Materials Theory, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden.;Uppsala Univ, Dept Phys & Astron, Div Mat Theory, Box 516, S-75120 Uppsala, Sweden.
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- Eriksson, Olle, 1960- (författare)
- Uppsala universitet,Örebro universitet,Institutionen för naturvetenskap och teknik,Division of Materials Theory, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden,Uppsala Univ, Dept Phys & Astron, Div Mat Theory, Box 516, S-75120 Uppsala, Sweden.;Örebro Univ, Sch Sci & Engn, Örebro, Sweden.,Materialteori
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- Vitos, Levente (författare)
- KTH,Materialvetenskap,Tillämpad fysik,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden.;Uppsala Univ, Dept Phys & Astron, Div Mat Theory, Box 516, S-75120 Uppsala, Sweden.;Wigner Res Ctr Phys, Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary.
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- Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden; Division of Materials Theory, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden;Uppsala Univ, Dept Phys & Astron, Div Mat Theory, Box 516, S-75120 Uppsala, Sweden. (creator_code:org_t)
- 2020-09-08
- 2020
- Engelska.
- Ingår i: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; 10:1
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The ordered phase of the FeNi system is known for its promising magnetic properties that make it a first-class rare-earth free permanent magnet. Mapping out the parameter space controlling the order-disorder transformation is an important step towards finding growth conditions that stabilize the [Formula: see text] phase of FeNi. In this work, we study the magnetic properties and chemical order-disorder transformation in FeNi as a function of lattice expansion by utilizing ab initio alloy theory. The largest volume expansion considered here is 29% which corresponds to a pressure of [Formula: see text] GPa. The thermodynamic and magnetic calculations are formulated in terms of a long-range order parameter, which is subsequently used to find the ordering temperature as a function of pressure. We show that negative pressure promotes ordering, meaning that synthetic routes involving an increase of the volume of FeNi are expected to expand the stability field of the [Formula: see text] phase.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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