Visualizing bulk band structure in
                    <math>
                      <mrow>
                        <msub>
                          <mi>Fe</mi>
                          <mn>4</mn>
                        </msub>
                        <mi>N</mi>
                      </mrow>
                    </math>
                    thin films by spin- and angle-resolved photoelectron spectroscopy

Karen Nakanishi; Masaaki Kakoki; Kiyotaka Ohwada; Kenta Kuroda; Kazuki Sumida; Hitoshi Sato; Koji Miyamoto; Taichi Okuda; Shinji Isogami; Keisuke Masuda; Yuya Sakuraba; Akio Kimura

doi:10.1103/mlcy-gszb

Journal article Visualizing bulk band structure in ${Fe}_{4} N$ thin films by spin- and angle-resolved photoelectron spectroscopy

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Karen Nakanishi, Masaaki Kakoki, Kiyotaka Ohwada, Kenta Kuroda, Kazuki Sumida, Hitoshi Sato, Koji Miyamoto, Taichi Okuda, Shinji Isogami, Keisuke Masuda, Yuya Sakuraba, Akio Kimura. Visualizing bulk band structure in

{Fe}_{4} N

thin films by spin- and angle-resolved photoelectron spectroscopy. Physical Review Research. 2026, 8 (2), 023257. https://doi.org/10.1103/mlcy-gszb

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(abstract)

The bulk band structure of an in situ prepared ferromagnetic Fe4⁢N thin film has been investigated using spin- and angle-resolved photoelectron spectroscopy with synchrotron radiation. It was observed that most of the bands near the Fermi level are of minority spin. The experimental results are well reproduced by first-principles calculations. Our orbital analysis of the band structure has revealed that the electron pocket near the Γ point is primarily attributed to the Fe 3⁢𝑑𝑥⁢𝑦 orbital of the Fe(II) site, while the electron pocket near the M point is associated with the Fe(II) 3⁢𝑑𝑧2 orbital. Our observation of real band structure in Fe4⁢N thin films could provide valuable insight into the properties of anisotropic magnetoresistance and anomalous Nernst effect.

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