NMR-ON Studies on the Magnetic Hyperfine Field at 140La in Fe

Nuclear magnetic resonance on oriented nuclei (NMR-ON) of La existing as a dilute impurity in Fe was observed for the first time. NMR-ON experiments were performed by detecting the 1596 keV γ rays from the β decay of 140La in external magnetic fields of 0.1, 0.2, 0.4 and 0.6 T. From the external mag...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2003-03, Vol.72 (3), p.723
Main Authors: Goto, Jun, Tanigaki, Minoru, Taniguchi, Akihiro, Ohkubo, Yoshitaka, Kawase, Yoichi, Ohya, Susumu, Nishimura, Katsuhiko, Ohtsubo, Takashi, Muto, Suguru
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Language:English
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Summary:Nuclear magnetic resonance on oriented nuclei (NMR-ON) of La existing as a dilute impurity in Fe was observed for the first time. NMR-ON experiments were performed by detecting the 1596 keV γ rays from the β decay of 140La in external magnetic fields of 0.1, 0.2, 0.4 and 0.6 T. From the external magnetic-field dependence of the resonance frequency, the magnetic hyperfine field and the Knight shift were deduced to be Bhf=-47±1 T and K=-4.0±3.4%, respectively. The effective relaxation time of 140LaFe at 8 mK in an external magnetic field of 0.2 T was determined to be 8.8±1.5 min using a single-exponential fit. The present value of the magnetic hyperfine field agrees with that deduced from a two-site model by the low-temperature nuclear orientation method.
ISSN:0031-9015
1347-4073