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Journal Articles

Magnetic and structure transition of Mn $_{3-x}$ FeO solid solutions under high-pressure and high-temperature conditions

Yamanaka, Takamitsu*; Hirao, Naohisa*; Nakamoto, Yuki*; Mikouchi, Takashi*; Hattori, Takanori; Komatsu, Kazuki*; Mao, H.-K.*

Physics and Chemistry of Minerals, 49(10), p.41_1 - 41_14, 2022/10

https://doi.org/10.1007/s00269-022-01215-4

Times Cited Count：0 Percentile：0.02(Materials Science, Multidisciplinary)

Magnetic and crystal structure of Mn $_{3-x}$ FeO solid solutions under high-PT conditions are investigated by neutron diffraction and synchrotron Mssbauer spectroscopy. The ferrimagnetic-paramagnetic transition and tetragonal-cubic transition of MnFeO spinel occur at 100C and 180C, respectively, suggesting both the transitions are not coupled. The structure transition temperature decreases with pressure. Mssbauer experiments and neutron diffraction revealed that the Fe $^{2+}$ occupancy in tetrahedral site increases increase with pressure, suggesting MnFeO phase approaches inverse spinel. Magnetic structure refinement clarified paramagnetic and ferrimagnetic structure of MnFeO and MnFeO. These spinels transform into high-pressure orthorhombic phases at 18.4 and 14.0 GPa, respectively, indicating lower transition pressure with increasing Mn content.

Journal Articles

Magnetic and electrical properties of NpTGa $_{5}$ (T=Fe, Rh and Ni)

Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu; Sakai, Hironori; Yamamoto, Etsuji; Nakamura, Akio; Haga, Yoshinori; Settai, Rikio*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 74(8), p.2323 - 2331, 2005/08

https://doi.org/10.1143/JPSJ.74.2323

Times Cited Count：53 Percentile：85.25(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Field-induced transition between magnetically disordered and ordered phases in underdoped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$

Khaykovich, B.*; Wakimoto, Shuichi; Birgeneau, R. J.*; Kastner, M. A.*; Lee, Y. S.*; Smeibidle, P.*; Vorderwisch, P.*; Yamada, Kazuyoshi*

Physical Review B, 71(22), p.220508_1 - 220508_4, 2005/06

https://doi.org/10.1103/PhysRevB.71.220508

Times Cited Count：74 Percentile：89.86(Materials Science, Multidisciplinary)

Magnetic field-induced transition between magnetically disordered and ordered phases in slightly under-doped La $_{2-x}$ Sr $_{x}$ CuO $_{4}$ with has been observed. Static incommensurate spin-density-wave order is induced above a critical field of about 3 T, as measured by elastic neutron scattering. These results are consistent with recently developed quantum phase transition scenario.