A high-throughput high-sensitivity optical technique for measuringmagnetostriction of thin-film composition-spread samples has been developed. It determines the magnetostriction by measuring the induced deflection of micromachined cantilever unimorph samples. Magnetostrictionmeasurements have been performed on as-deposited Fe–Ga and Fe–Ga–Al thin-film composition spreads. The thin-film Fe–Ga spreads display a similar compositional variation of magnetostriction as bulk. A previously undiscovered peak in magnetostriction at low Ga content was also observed and attributed to a maximum in the magnetocrystalline anisotropy. Magnetostrictive mapping of the Fe–Ga–Al ternary system reveals the possibility of substituting up to 8at.%Al in Fe70Ga30 without significant degradation of magnetostriction.
Published in Applied Physics Letters, Volume 93, Issue 10, 2008, pages #102507-.
©Applied Physics Letters 2008, AIP (American Institute of Physics).
Hattrick-Simpers, J., Hunter, D., Craciunescu, C. M., Jang, K. S., Murakami, M., Cullen, J., Wuttig, M., Takeuchi, I., Lofland, S. E., Bendersky, L., Woo, N., Van Dover, R. B., Takahashi, R., & Furuya, Y. (8 September 2008). Combinatorial Investigation of Magnetostriction in Fe-Fa and Fe-Ga-Al. Applied Physics Letters, 93 (10), #102507. http://dx.doi.org/10.1063/1.2980034