Abstract
In the highly-correlated electron system Sr1-xNdxMnO3(SNMO) having the simple perovskite structure, there are interesting electronic states, which are related to degrees of charge, orbital, and spin freedoms for eg electrons in Mn ions. Among these states, in the case of SNMO, the C-, A- and CE-type antiferromagnetic states were reported for 0.20 ≤ x ≤ 0.38, for 0.38 ≤ x ≤ 0.48, and for 0.48 ≤ x ≤ 0.52, respectively. The points to note here are that these antiferromagnetic states are directly associated with corresponding orbital orderings, and that the CE-type state also accompanies charge ordering. Because of these features, we were interested in the (A → CE) state change in SNMO. The crystallographic features of prepared SNMO samples with 0.46 ≤ x ≤ 0.50 have thus been investigated mainly by means of a transmission electron microscope equipped with a low-temperature holder. As a result, the state around 100 K for x = 0.48 was first understood to be identified as the Imma state, which includes a large number of orbital-modulated (OM) regions with an average size of about 10 nm. The feature of such regions is that the orbital modulation has an incommensurate periodicity and a charge modulation is absent in them. On the other hand, the CE-type state having the commensurate orbital and charge modulations was also confirmed to be present for x = 0.50. In addition to these two states, the state around 100 K for x = 0.46 was found to be characterized by the coexistence state consisting of the C-type orbital-ordered state and the Imma states including OM regions. In other words, the presence of the A-type orbital-ordered state could not be confirmed in the temperature range between 300 K and about 100 K for 0.46 ≤ x ≤ 0.50 in this study.
| Original language | English |
|---|---|
| Title of host publication | THERMEC 2016 |
| Publisher | Trans Tech Publications Ltd |
| Pages | 1766-1771 |
| Number of pages | 6 |
| Volume | 879 |
| ISBN (Print) | 9783035711295 |
| DOIs | |
| Publication status | Published - 2017 |
| Event | 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria Duration: 2016 May 29 → 2016 Jun 3 |
Publication series
| Name | Materials Science Forum |
|---|---|
| Volume | 879 |
| ISSN (Print) | 02555476 |
Other
| Other | 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 |
|---|---|
| Country | Austria |
| City | Graz |
| Period | 16/5/29 → 16/6/3 |
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Keywords
- CE-type state
- Highly-correlated electronic system
- Orbital modulation
- Simple-perovskite manganite
- SrNdMnO
- Transmission electron microscopy
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Features of electronic states in the highly-correlated electronic system Sr1-xNdxMnO3 around x = 0.50. / Shimasaki, Rina; Shiratani, Ayumi; Sato, Hiroki; Inoue, Yasuhide; Koyama, Yasumasa.
THERMEC 2016. Vol. 879 Trans Tech Publications Ltd, 2017. p. 1766-1771 (Materials Science Forum; Vol. 879).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Features of electronic states in the highly-correlated electronic system Sr1-xNdxMnO3 around x = 0.50
AU - Shimasaki, Rina
AU - Shiratani, Ayumi
AU - Sato, Hiroki
AU - Inoue, Yasuhide
AU - Koyama, Yasumasa
PY - 2017
Y1 - 2017
N2 - In the highly-correlated electron system Sr1-xNdxMnO3(SNMO) having the simple perovskite structure, there are interesting electronic states, which are related to degrees of charge, orbital, and spin freedoms for eg electrons in Mn ions. Among these states, in the case of SNMO, the C-, A- and CE-type antiferromagnetic states were reported for 0.20 ≤ x ≤ 0.38, for 0.38 ≤ x ≤ 0.48, and for 0.48 ≤ x ≤ 0.52, respectively. The points to note here are that these antiferromagnetic states are directly associated with corresponding orbital orderings, and that the CE-type state also accompanies charge ordering. Because of these features, we were interested in the (A → CE) state change in SNMO. The crystallographic features of prepared SNMO samples with 0.46 ≤ x ≤ 0.50 have thus been investigated mainly by means of a transmission electron microscope equipped with a low-temperature holder. As a result, the state around 100 K for x = 0.48 was first understood to be identified as the Imma state, which includes a large number of orbital-modulated (OM) regions with an average size of about 10 nm. The feature of such regions is that the orbital modulation has an incommensurate periodicity and a charge modulation is absent in them. On the other hand, the CE-type state having the commensurate orbital and charge modulations was also confirmed to be present for x = 0.50. In addition to these two states, the state around 100 K for x = 0.46 was found to be characterized by the coexistence state consisting of the C-type orbital-ordered state and the Imma states including OM regions. In other words, the presence of the A-type orbital-ordered state could not be confirmed in the temperature range between 300 K and about 100 K for 0.46 ≤ x ≤ 0.50 in this study.
AB - In the highly-correlated electron system Sr1-xNdxMnO3(SNMO) having the simple perovskite structure, there are interesting electronic states, which are related to degrees of charge, orbital, and spin freedoms for eg electrons in Mn ions. Among these states, in the case of SNMO, the C-, A- and CE-type antiferromagnetic states were reported for 0.20 ≤ x ≤ 0.38, for 0.38 ≤ x ≤ 0.48, and for 0.48 ≤ x ≤ 0.52, respectively. The points to note here are that these antiferromagnetic states are directly associated with corresponding orbital orderings, and that the CE-type state also accompanies charge ordering. Because of these features, we were interested in the (A → CE) state change in SNMO. The crystallographic features of prepared SNMO samples with 0.46 ≤ x ≤ 0.50 have thus been investigated mainly by means of a transmission electron microscope equipped with a low-temperature holder. As a result, the state around 100 K for x = 0.48 was first understood to be identified as the Imma state, which includes a large number of orbital-modulated (OM) regions with an average size of about 10 nm. The feature of such regions is that the orbital modulation has an incommensurate periodicity and a charge modulation is absent in them. On the other hand, the CE-type state having the commensurate orbital and charge modulations was also confirmed to be present for x = 0.50. In addition to these two states, the state around 100 K for x = 0.46 was found to be characterized by the coexistence state consisting of the C-type orbital-ordered state and the Imma states including OM regions. In other words, the presence of the A-type orbital-ordered state could not be confirmed in the temperature range between 300 K and about 100 K for 0.46 ≤ x ≤ 0.50 in this study.
KW - CE-type state
KW - Highly-correlated electronic system
KW - Orbital modulation
KW - Simple-perovskite manganite
KW - SrNdMnO
KW - Transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=85000366258&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85000366258&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.879.1766
DO - 10.4028/www.scientific.net/MSF.879.1766
M3 - Conference contribution
SN - 9783035711295
VL - 879
T3 - Materials Science Forum
SP - 1766
EP - 1771
BT - THERMEC 2016
PB - Trans Tech Publications Ltd
ER -