Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kobayashi, Masaki*; Anh, L. D.*; Suzuki, Masahiro*; Kaneta-Takada, Shingo*; Takeda, Yukiharu; Fujimori, Shinichi; Shibata, Goro*; Tanaka, Arata*; Tanaka, Masaaki*; Oya, Shinobu*; et al.
Physical Review Applied (Internet), 15(6), p.064019_1 - 064019_10, 2021/06
Times Cited Count:5 Percentile:42.31(Physics, Applied)Kajimoto, Ryoichi; Mochizuki, Hidenori*; Yoshizawa, Hideki*; Shintani, Hiroshi*; Kimura, Tsuyoshi*; Tokura, Yoshinori*
Journal of the Physical Society of Japan, 74(9), p.2430 - 2433, 2005/09
Times Cited Count:37 Percentile:79.50(Physics, Multidisciplinary)Magnon excitations have been investigated for PrMnO showing the
-type antiferromagnetic ordering and TbMnO
forming a long-period spin ordering by inelastic neutron scattering. Combined with a result of LaMnO
[K.~Hirota
], the systematic data revealed that the ferromagnetic exchange interaction between nearest-neighbor (NN) Mn sites within the
plane drastically decreases in
MnO
as the ionic radius of
is reduced. In addition, finite next-nearest-neighbor (NNN) coupling is evident in TbMnO
. In contrast, the exchange interaction along the
axis shows much weaker
dependence consistent with the Mn-O-Mn bond angle. These observations confirm a scenario that explains the evolution of spin structures in
MnO
in terms of the competition between the NN and NNN interactions [T.Kimura
].
Agui, Akane; Kmbre, T.*; S
the, C.*; Nordgren, J.*; Usuda, Manabu; Saito, Tomohiko*; Moritomo, Yutaka*
Journal of Electron Spectroscopy and Related Phenomena, 144-147, p.589 - 592, 2005/06
Times Cited Count:1 Percentile:5.66(Spectroscopy)Current research in the perovskite and layered perovskite-type manganese oxides has expanded to include the study of electronic and magnetic properties such as the colossal magnetoresistance (CMR), orbital ordering and charge ordering. The O K soft X-ray emission and absorption spectra (XES and XAS) of La
Sr
Mn
O
were measured at selected excitation energies in order to investigate the electronic structure. The measurements were carried out by using a soft X-ray emission spectrometer at beamline BW3 at HASYLAB, Germany. The dependence of O K
XES on excitation-energy was observed. It is attributed the different site of oxygen ions.
Agui, Akane; Butorin, S. M.*; Kmbre, T.*; S
the, C.*; Saito, Tomohiko*; Moritomo, Yutaka*; Nordgren, J.*
Journal of the Physical Society of Japan, 74(6), p.1772 - 1776, 2005/06
Times Cited Count:8 Percentile:48.22(Physics, Multidisciplinary)no abstracts in English
Ibrahim, K.*; Qian, H. J.*; Wu, X.*; Abbas, M. I.*; Wang, J. O.*; Hong, C. H.*; Su, R.*; Zhong, J.*; Dong, Y. H.*; Wu, Z. Y.*; et al.
Physical Review B, 70(22), p.224433_1 - 224433_9, 2004/12
Times Cited Count:30 Percentile:75.73(Materials Science, Multidisciplinary)no abstracts in English
Machida, Akihiko; Moritomo, Yutaka*; Oyama, Kenji*
Journal of the Physical Society of Japan, 72(5), P. 1312, 2003/05
In order to investigate interrelation between the lattice structure and the magnetic structure, we have performed Rietveld structural analysis on the neutron powder patterns for TbCa
MnO
at low temperature. In the concentration range of
, we observed the Bragg reflections due to the CE-like- and C-type structures. In this range, the powder patterns were reproduce by the two-phase model with
and
symmetries. The fractions of these phases change against concentration
. This variation of the fraction for the
phase is similar to the variation of the integrated intensities of the CE-like-type magnetic Bragg reflections. This indicates that the
phase is responsible for the CE-like spin-ordering. Furthermore, we discussed interrelation between the detailed lattice structure and magnetic structure.
Inami, Toshiya; Fukuda, Tatsuo; Mizuki, Junichiro; Ishihara, Sumio*; Kondo, Hiroshi*; Nakao, Hironori*; Matsumura, Takeshi*; Hirota, Kazuma*; Murakami, Yoichi*; Maekawa, Sadamichi*; et al.
Physical Review B, 67(4), p.045108_1 - 045108_6, 2003/01
Times Cited Count:56 Percentile:87.91(Materials Science, Multidisciplinary)We report resonant inelastic x-ray scattering experiments of the orbitally ordered manganite LaMnO. When incident photon energy is tuned near the Mn
absorption edge, the spectra reveal three features at 2.5 eV, 8 eV and 11 eV. The 8 eV and 11 eV peaks are ascribed to transitions from the O 2
bands to the empty Mn 3
and
/
bands, respectively. On the other hand, the 2.5 eV peak is considered an orbital excitation across the Mott gap,
an electron excitation from the effective lower Hubbard band with the
and
orbital characters to the upper Hubbard band with the
and
ones. The weak dispersion and characteristic azimuthal angle dependence of this excitation are well reproduced by a theory which includes orbital degeneracy and strong electron correlation.