Open AccessGrazing‐incidence synchrotron‐radiation 57 Fe‐Mössbauer spectroscopy using a nuclear Bragg monochromator and its application to the study of magnetic thin films
Author(s) -
Mitsui Takaya,
Masuda Ryo,
Seto Makoto,
Suharyadi Edi,
Mibu Ko
Publication year - 2012
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049511049958
Subject(s) - monochromator , synchrotron radiation , mössbauer spectroscopy , synchrotron , materials science , optics , spectroscopy , bragg peak , physics , nuclear physics , wavelength , quantum mechanics , beam (structure)
Energy‐domain grazing‐incidence 57 Fe‐Mössbauer spectroscopy (E‐GIMS) with synchrotron radiation (SR) has been developed to study surface and interface structures of thin films. Highly brilliant 57 Fe‐Mössbauer radiation, filtered from SR by a 57 FeBO 3 single‐crystal nuclear Bragg monochromator, allows conventional Mössbauer spectroscopy to be performed for dilute 57 Fe in a mirror‐like film in any bunch‐mode operation of SR. A theoretical and experimental study of the specular reflections from isotope‐enriched ( 57 Fe: 95%) and natural‐abundance ( 57 Fe: ∼2%) iron thin films has been carried out to clarify the basic features of the coherent interference between electronic and nuclear resonant scattering of 57 Fe‐Mössbauer radiation in thin films. Moreover, a new surface‐ and interface‐sensitive method has been developed by the combination of SR‐based E‐GIMS and the 57 Fe‐probe layer technique, which enables us to probe interfacial complex magnetic structures in thin films with atomic‐scale depth resolution.