{'fraction_non_alphanumeric': 0.027777777777777776, 'fraction_numerical': 0.019965277777777776, 'mean_word_length': 4.88265306122449, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Influence of lattice relaxation on the electron-spin motion in ferromagnetic films: experiment and theory

Fe films grown on Ag(001) as well as MgO films on Fe(001) have been studied by spin-polarized electron reflection experiments. The three central observations are: 1) Oscillations with monolayer periodicity of the electron-spin motion angles ε and Φ are observed as a function of the Fe thickness. They are attributed to the oscillatory behavior of the surface-lattice strain that is relaxed at island edges of the incompletely filled top Fe layer. 2) For strongly relaxed thick Fe films a giant spin precession angle of 180o, which is accompanied by a pronounced minimum in the reflected electron intensity, is observed for an electron energy of 7.3 eV. 3) For the interface system MgO/Fe(001) a very strong sensitivity of the spin motion angles on the MgO coverage is observed for certain energy ranges. Ab-initio band structure and spin-dependent electron reflection calculations reveal that lattice relaxations during growth of Fe on Ag(001) as well as MgO on Fe(001) are responsible for the strong changes of the electron-spin motion angles.