Journal article
Effect of Hf alloying on magnetic, structural, and magnetostrictive properties in FeCo films for magnetoelectric heterostructure devices
APL materials, v 11(11), pp 111107-111107-7
01 Nov 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Materials with high magnetoelectric coupling are attractive for use in engineered multiferroic heterostructures with applications such as ultra-low power magnetic sensors, parametric inductors, and non-volatile random-access memory devices. Iron–cobalt alloys exhibit both high magnetostriction and high saturation magnetization that are required for achieving significantly higher magnetoelectric coupling. We report on sputter-deposited (Fe0.5Co0.5)1−xHfx (x = 0 – 0.14) alloy thin films and the beneficial influence of Hafnium alloying on the magnetic and magnetostrictive properties. We found that co-sputtering Hf results in the realization of the peening mechanism that drives film stress from highly tensile to slightly compressive. Scanning electron microscopy and x-ray diffraction along with vibrating sample magnetometry show reduction in coercivity with Hf alloying that is correlated with reduced grain size and low film stress. We demonstrate a crossover from tensile to compressive stress at x ∼ 0.09 while maintaining a high magnetostriction of 50 ppm and a low coercive field of 1.1 Oe. These characteristics appear to be related to the amorphous nature of the film at higher Hf alloying.
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Details
- Title
- Effect of Hf alloying on magnetic, structural, and magnetostrictive properties in FeCo films for magnetoelectric heterostructure devices
- Creators
- Thomas Mion - American Society For Engineering EducationMargo Staruch - United States Naval Research LaboratoryKonrad Bussmann - United States Naval Research LaboratoryGoran Karapetrov - Drexel UniversityOlaf van ’t Erve - United States Naval Research LaboratorySara Mills - American Society For Engineering EducationHeonjune Ryou - United States Naval Research LaboratoryRamasis Goswami - United States Naval Research LaboratoryPatrick G. Callahan - United States Naval Research LaboratoryDavid J. Rowenhorst - United States Naval Research LaboratorySyed B. Qadri - United States Naval Research LaboratorySamuel E. Lofland - Rowan UniversityPeter Finkel - United States Naval Research Laboratory
- Publication Details
- APL materials, v 11(11), pp 111107-111107-7
- Publisher
- American Institute of Physics (AIP)
- Number of pages
- 7
- Grant note
- Office of Naval Research (https://doi.org/10.13039/100000006) American Society for Engineering Education (https://doi.org/10.13039/100000850)
- Resource Type
- Journal article
- Academic Unit
- Physics; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001098898600001
- Scopus ID
- 2-s2.0-85176583421
- Other Identifier
- 991021811632204721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied