Combinatorial Investigation of Ferromagnetic Shape-Memory Alloys in the Ni-Mn-Al Ternary System Using a Composition Spread Technique

Olugbenga O. Famodu; Jason Hattrick-Simpers; Maria Aronova; Kao-Shuo Chang; Makoto Murakami; Manfred Wuttig; Teiko Okazaki; Yasubumi Furuya; Lee A. Knauss; Leonid A. Bendersky; Frank. S. Biancaniello; Ichiro Takeuchi

doi:10.2320/matertrans.45.173

Olugbenga O. Famodu, Jason Hattrick-Simpers, Maria Aronova, Kao-Shuo Chang, Makoto Murakami, Manfred Wuttig, Teiko Okazaki, Yasubumi Furuya, Lee A. Knauss, Leonid A. Bendersky, Frank. S. Biancaniello, Ichiro Takeuchi

Author information

Olugbenga O. Famodu
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Jason Hattrick-Simpers
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Maria Aronova
Center for Superconductivity Research, Department of Physics, University of Maryland
Kao-Shuo Chang
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Makoto Murakami
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Manfred Wuttig
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Teiko Okazaki
Faculty of Science and Technology, Hirosaki University
Yasubumi Furuya
Faculty of Science and Technology, Hirosaki University
Lee A. Knauss
Neocera, Inc.
Leonid A. Bendersky
Materials Science and Engineering Laboratory, National Institute of Standards and Technology (NIST)
Frank. S. Biancaniello
Materials Science and Engineering Laboratory, National Institute of Standards and Technology (NIST)
Ichiro Takeuchi
Small Smart Systems Center, Department of Materials Science and Engineering, University of Maryland
Center for Superconductivity Research, Department of Physics, University of Maryland

Keywords: combinatorial, ferromagnetic shape-memory alloys, composition spreads, thin-film, phase diagram, martensitic transitions, quantitative magnetization mapping, scanning superconducting quantum interference device (SQUID) microscopy, magnetization, NiMnAl

JOURNAL FREE ACCESS

2004 Volume 45 Issue 2 Pages 173-177

DOI https://doi.org/10.2320/matertrans.45.173

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Abstract

Using a thin-film composition spread technique, we have mapped the phase diagram of the Ni-Mn-Al ternary system in search of ferromagnetic shape-memory alloys (FMSA). A characterization technique that allows detection of martensitic transitions by visual inspection using micromachined cantilever arrays was combined with quantitative magnetization mapping using scanning superconducting quantum interference device (SQUID) microscopy. A large compositional region in the Al deficient part of the phase diagram was found to be ferromagnetic and reversibly martensitic at room temperature. In addition, in the Al rich region, a new compositional range that displays marked ferromagnetism was found.

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