Full text loading...
(a) Energy diagram of nuclear spin system for (left) and (right). (b) Micrograph of the Hall-bar device. A pulsed rf-magnetic field is irradiated using the metal strip covering the 5- -wide conduction channel.
[(a)–(c)] NMR spectra obtained using the Hall-bar device before it was coated with a polyimide film. . Values of are 35.520 MHz (a), 49.808 MHz (b), and 63.286 MHz (c). [(d)–(f)] NMR spectra obtained using the Hall-bar device after it was coated with the polyimide film. . Values of are 41.963 MHz (d), 58.847 MHz (e), and 74.771 MHz (f). The solid curves are the fitting curves.
Changes in induced by applying a pulse of with various pulse durations at . The frequencies of are 41.952 MHz (a), 41.987 MHz (b), and 42.022 MHz (c) in (a), and 41.969 MHz (d) and 42.007 MHz (e) in (b). The curves are offset for clarity. The inset in (a) shows schematic energy diagram for single- and two-photon absorption/emission. The inset in (b) shows the NMR spectrum of with the input rf-voltage .
(a) Decay of spin-echo signal obtained in the Hall-bar device before the polyimide coating. . [(b) and (c)] Decays of spin-echo signals obtained in the Hall-bar device after the polyimide coating. . In the case of (c), the electrons were depleted during the rf-pulse irradiation. The inset of (a) shows a schematic of the pulse sequence for the spin-echo measurements. The inset of (b) shows a representative spin-echo signal obtained by changing with a fixed .
Article metrics loading...