Antiferromagnetic Phase Transition in Ordered FePt3 Investigated by Angle-Resolved Photoemission Spectroscopy

作者：Tobita Naohisa^*; Nakajima Nobuo; Ishimatsu Naoki; Maruyama Hiroshi; Shimada Kenya; Namatame Hirofumi; Taniguchi Masaki

来源：Journal of the Physical Society of Japan, 2010, 79(2): 024703.

DOI：10.1143/JPSJ.79.024703

• FePt3
• electronic band structure
• angle-resolved photoemission spectroscopy

The electronic band Structure of ordered FePt3(110) single crystal was studied by angle-resolved photoemission spectroscopy with synchrotron radiation. The energy band dispersions along the X-Gamma-X and R-M-R directions of a simple cubic Brillouin zone were Successfully observed at room temperature.,g file latter direction, band folding due to antiferromagnetic (AF) ordering was clearly observed Along the latter direction, band folding due to antiferromagnetic (AF) ordering was clearly observed below the Neel temperature (T-N2) of 100 K. Through comparison with theoretical Calculations. (1/2, 0, 0)-type AF ordering or a mixture of the (1/2, 0, 0)-type and (1/2, 1/2, 0)-type AF orderings was concluded to occur below T-N2. These magnetic orderings can be understood from the viewpoint of the nesting between the electron and hole pockets.

• 出版日期2010-2