Note: Force- and torque-detection of high frequency electron spin resonance using a membrane-type surface-stress sensor

Takahashi, Hideyuki; Ishimura, Kento; Okamoto, Tetsuhiko; Ohmichi, Eiji; Ohta, H.

doi:10.1063/1.5018831

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…The Zohlfargakani experiment was entirely electromechanical, and used capacitance-based displacement detection. Commercial membrane stress sensors with piezoresistive readouts have been utilized very recently to demonstrate both force-and torque-detection of electron spin resonance [108].…”

Section: Advances Utilizing Electromechanical Detection (And Non-dete...mentioning

confidence: 99%

Recent advances in mechanical torque studies of small-scale magnetism

Losby

Sauer

Freeman

2018

J. Phys. D: Appl. Phys.

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There is a storied scientific history in the role of mechanical instruments for the measurement of fundamental physical interactions. Among these include the detection of magnetic torques via a displacement of a compliant mechanical sensor as a result of angular momentum transfer. Modern nanofabrication methods have enabled the coupling of mechanical structures to single, miniature magnetic specimens. This has allowed for strikingly sensitive detection of magnetic hysteresis and other quasi-static effects, as well as spin resonances, in materials confined to nanoscale geometries. The extraordinary sensitivities achieved in mechanical transduction through recent breakthroughs in cavity optomechanics, where a high-finesse optical cavity is used for readout of motion, are now being harnessed for torque magnetometry. In this article, we review the recent progress in mechanical detection of magnetic torques, highlight current applications, and speculate on possible future developments in the technology and science. Guidelines for designing and implementing the measurements are also included. Acknowledgements 21 Appendix: Designer's guide 22 A feel for the numbers 22 Underlying scaling behaviour as a function of torque sensor/specimen linear size 22 Readout sensitivity 23 Low finesse interferometer 23 High finesse optical cavity 24 References 25 arXiv:1806.06288v1 [cond-mat.mes-hall]

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Section: Advances Utilizing Electromechanical Detection (And Non-dete...mentioning

confidence: 99%

Recent advances in mechanical torque studies of small-scale magnetism

Losby

Sauer

Freeman

2018

J. Phys. D: Appl. Phys.

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“…Recently, membrane-type micromechanical devices have proved to be effective for magnetic and [24,25] mag- netic resonance measurements [26,27]. As these devices have excellent physical properties, it is expected that they can address the problems associated with microcantilevers [28].…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…Force-detected HFESR has been studied in various configurations (e.g. SOC [17][18][19][20][21], magnet-oncantilever [16], and sample-on-membrane [27]). Among these, the SOC configuration achieved the highest absolute spin sensitivity in the range of 10 8 -10 9 spins/G•s.…”

Section: B Comparison With Other Techniquesmentioning

confidence: 99%

Force-detected high-frequency electron spin resonance spectroscopy using magnet-mounted nanomembrane: Robust detection of thermal magnetization modulation

Takahashi

Okamoto

Ishimura

et al. 2018

Review of Scientific Instruments

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In this study, we report a conceptually novel broadband high-frequency electron spin resonance (HFESR) spectroscopic technique. In contrast to the ordinary force-detected ESR technique, which detects the magnetization change due to the saturation effect, this method measures the magnetization change due to the change of the sample temperature at resonance. To demonstrate its principle, we developed a silicon nitride nanomembrane-based force-detected ESR spectrometer, which can be stably operated even at high magnetic fields. Test measurements were performed for samples with different spin relaxation times. We succeeded in obtaining a seamless ESR spectrum in magnetic fields of 15 T and frequencies of 636 GHz without significant spectral distortion. A high spin sensitivity of 10 12 spins/G·s was obtained, which was independent of the spin relaxation time. These results show that this technique can be used as a practical method in research fields where the HFESR technique is applicable.

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“…Most of these methods are based on the resonator techniques; [3][4][5] however, mechanical detection methods have also been reported. 6,7 We focus on the thermal detection method to extend the frequency range of angle-dependent ESR spectroscopy. Among a variety of electron spin resonance measurement techniques, thermal detection is a relatively old technique that was originally demonstrated in the year 1966.…”

Section: Introductionmentioning

confidence: 99%

Field-angle-dependent multi-frequency electron spin resonance spectroscopy in submillimeter wave range based on thermal detection

Takahashi

Sakurai

Ohmichi

et al. 2021

Review of Scientific Instruments

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We report the thermally detected electron spin resonance (ESR) spectroscopy in the frequency range of millimeter and submillimeter waves. Under high vacuum conditions, a cantilever-shaped device detects ESR absorption of a mounted sample as a temperature difference in its beam direction. Despite the simple experimental setup, the spin sensitivity of the order of 1012 spins/G was achieved at 10 K. The developed sample stage is small enough to be used in a 10 T split-pair superconducting magnet with a bore of 25 mm, enabling precise field-angle-dependent ESR measurements at multi-frequencies above 500 GHz. We demonstrate its usefulness by studying the field-angle dependence of the excitation energy of the dimer triplet state in the Shastry–Sutherland magnet SrCu2(BO3)2.

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Note: Force- and torque-detection of high frequency electron spin resonance using a membrane-type surface-stress sensor

Cited by 5 publications

References 11 publications

Recent advances in mechanical torque studies of small-scale magnetism

Recent advances in mechanical torque studies of small-scale magnetism

Force-detected high-frequency electron spin resonance spectroscopy using magnet-mounted nanomembrane: Robust detection of thermal magnetization modulation

Field-angle-dependent multi-frequency electron spin resonance spectroscopy in submillimeter wave range based on thermal detection

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