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Magnetic detection of high-resolution electron spin resonance using a microcantilever in the millimeter-wave region

E Ohmichi¹, N Mizuno, M Kimata

¹Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan. ohmichi@harbor.kobe-u.ac.jp

The Review of Scientific Instruments

|December 3, 2008

Abstract:

Highly sensitive magnetic detection of electron spin resonance (ESR) using a microcantilever is presented. By combining a modulation technique with the use of a piezoresistive cantilever, we successfully observed ESR signals of a tiny single crystal (mass<1 microg) of Co Tutton salt, Co(NH(4))(2)(SO(4))(2) x 6 H(2)O, in the frequency region of 80-240 GHz. The achieved spin sensitivity was approximately 10(9) spins/G at 4.5 K, providing promising applications to high-resolution and high-sensitivity terahertz ESR.

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