Open AccessEpitaxial growth and magnetic properties of NixFe4-xN (x = 0, 1, 3, and 4) films on SrTiO3(001) substrates
Author(s) -
Fumiya Takata,
Keita Ito,
Soma Higashikozono,
Toshiki Gushi,
Kaoru Toko,
Takashi Suemasu
Publication year - 2016
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.4961734
Subject(s) - curie temperature , magnetization , ferromagnetism , lattice constant , epitaxy , condensed matter physics , materials science , paramagnetism , crystal structure , substrate (aquarium) , saturation (graph theory) , crystallography , single crystal , chemistry , nanotechnology , magnetic field , physics , diffraction , optics , mathematics , oceanography , layer (electronics) , combinatorics , geology , quantum mechanics
The 20–60 nm-thick epitaxial Ni xFe4- xN (x = 0, 1, 3, and 4) films were successfully fabricated on SrTiO3(001) single-crystal substrates by alternating the substrate temperature (T sub), and their crystalline qualities and magnetic properties were investigated. It was found that the crystal orientation and the degree of order of N site were improved with the increase of T sub for x = 1 and 3. The lattice constant and saturation magnetization decreased as the Ni content increased. This tendency was in good agreement with first-principle calculation. Curie temperature of the Ni 3FeN film was estimated to be 266 K from the temperature dependence of magnetization. The Ni 4N film was not ferromagnetic but paramagnetic due to its low degree of order of N site
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