Electron paramagnetic resonance spectroscopy using a direct current-SQUID magnetometer directly coupled to an electron spin ensemble

We demonstrate electron spin polarization detection and electron paramagnetic resonance (EPR) spectroscopy using a direct current superconducting quantum interference device (dc-SQUID) magnetometer. Our target electron spin ensemble is directly bonded to the dc-SQUID magnetometer that detects electr...

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Veröffentlicht in:	Applied physics letters 2016-02, Vol.108 (5), p.52601
Hauptverfasser:	Toida, Hiraku, Matsuzaki, Yuichiro, Kakuyanagi, Kosuke, Zhu, Xiaobo, Munro, William J., Nemoto, Kae, Yamaguchi, Hiroshi, Saito, Shiro
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied physics Computer memory Direct current Electron paramagnetic resonance Electron spin Electrons Polarization (spin alignment) Spectroscopy Spectrum analysis Superconducting quantum interference devices
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Beschreibung
Zusammenfassung:	We demonstrate electron spin polarization detection and electron paramagnetic resonance (EPR) spectroscopy using a direct current superconducting quantum interference device (dc-SQUID) magnetometer. Our target electron spin ensemble is directly bonded to the dc-SQUID magnetometer that detects electron spin polarization induced by an external magnetic field or EPR in a micrometer-sized area. The minimum distinguishable number of polarized spins and sensing volume of the electron spin polarization detection and the EPR spectroscopy are estimated to be ∼ 10 6 and ∼ 10 − 10 cm 3 (∼0.1 pl), respectively.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.4940978