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Meeting Materials Science & Technology 2020
Symposium Metallurgy and Magnetism
Presentation Title Exchange Coupled Ferromagnetism in Nanochessboards Obtained By Eutectoid Decomposition in the Co-Pt and Fe-Pt Systems
Author(s) Adrian Savovici, Eric Vetter, William Soffa, Jerrold Floro
On-Site Speaker (Planned) Adrian Savovici
Abstract Scope The nanochessboard is a fascinating microstructure in which to investigate exchange-coupled ferromagnetism. In Co-Pt, cooling through the eutectoid, A1 → L10+L12 , produces a quasi-periodic tiling of L10 nanorods coherently embedded in an L12 matrix. Both ordered product phases are ferromagnetic, where L10 (L12) has large (small) magnetocrystalline anisotropy. First order reversal curve analysis shows that exchange-coupling evolves from partial to complete as the period is reduced to the critical lengthscale. The Fe-Pt system offers distinct advantages, since there will be higher magnetic moment in the soft phase and larger anisotropy in the hard phase, vis--vis Co-Pt. However, the chessboard has not been previously observed in this system, and we will show initial results on eutectoid decomposition in the two-phase region. Micromagnetic simulations are also being carried out to examine the effects of increased magnetization and magnetocrystalline anisotropy. Support of the National Science Foundation through grant DMR-1709914 is gratefully acknowledged.


Comparative Studies on the Structure and Magnetic Properties of Mechanically Alloyed Fe40Co30Ni30 Medium-entropy Alloy in Argon and Ambient Atmospheres
Development of FeCo/MnZn Ferrite Composite by Field Assisted Sintering Technique
Effects of Steel Sensitization on Magnetic Properties Measured through MOKE Magnetometry
Exchange Coupled Ferromagnetism in Nanochessboards Obtained By Eutectoid Decomposition in the Co-Pt and Fe-Pt Systems
Improvement of the Magnetic Characteristics of Materials Due to the Formation of Unidirectional Boundaries of Ferrite during Processing in SHS Conditions
Introductory Comments: Metallurgy and Magnetism
Magnetic Performance of Gas-atomized Maraging Steel Powders
Microstructural Development and Mechanical Property Changes Due to Temper Embrittlement in HY-80 Submarine Steel
Modeling the Magnetostructural Interactions in Austenitic Steels at the Quantum Mechanical Level
Processing of Fe-Co Alloys: Past and Present
Processing of Vitreous Fe-based Wires into Nanostructured Soft Magnetic Material
Rapid Thermal Processing of Amorphous and Nanocrystalline Soft Magnetic Alloys
The Effect of Deformation of Low Alloy Steels Used in Metallurgy on Their Magnetic Characteristics
The Influence of the Microstructure Obtained After Processing in SHS Conditions on the Magnetic Characteristics of Steels

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