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Miyake, Atsushi*; Kanemasa, Tsunehiro*; Yagi, Ryohei*; Kagayama, Tomoko*; Shimizu, Katsuya*; Haga, Yoshinori; Onuki, Yoshichika
Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.e222 - e224, 2007/03
We have measured electrical resistivity of single crystalline -manganese (-Mn) under high pressure. -Mn shows an antiferromagnetic ordering at = 95 K and has four inequivalent crystal sites with different magnetic moments. With increasing pressure, shifts toward lower temperature. At higher pressure, the shape of anomaly at changes to a kink-like one, which may indicate different magnetic ordering from that at lower pressure. Such a difference between lower and higher pressure regions is considered to be caused by the four inequivalent magnetic moments in -Mn. At 1.9 GPa, the boundary of the ordered phases, we observe a sudden decrease of the residual resistivity and a peak of the A-coefficient of -term of the resistivity.