Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd)

Yasuhide Inoue; Masazumi Arao; Go Shindo; Yasumasa Koyama

doi:10.4028/www.scientific.net/MSF.638-642.1760

Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd)

Yasuhide Inoue^*, Masazumi Arao, Go Shindo, Yasumasa Koyama

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

To understand a stability of the orbital-modulated (OM) state in Sr _2-xR_xMnO₄ (R = Pr, Nd), the crystallographic features of oxide samples with 0.20 < _x ≤ 0.50, prepared by the coprecipitation technique, have been investigated by transmission electron microscopy. When the Pr content x corresponding to the e_g-electron concentration increased from x = 0, the OM state appeared in 0.20 < x ≤ 0.40 as a neighboring state of an orbital ordered (OO) state around x = 0.20. The interesting features are that around x = 0.44 there is a nanometer-sized coexisting state consisting of the OM and disordered tetragonal (DT) states, and that an average size of OM-state regions in the coexisting state decreases with increasing the e_g-electron concentration. In addition, the so-called CE-type antiferromagnetic state found in Sr_1.5La _0.5MnO₄ is absent in the Nd and Pr cases. This suggests that the stability of the OM state is not directly associated with charge ordering of e_g electrons, but basically due to only their orbital ordering.

Original language	English
Title of host publication	THERMEC 2009
Editors	Tara Chandra, Tara Chandra, Tara Chandra, N. Wanderka, N. Wanderka, N. Wanderka, Walter Reimers, Walter Reimers, Walter Reimers, M. Ionescu, M. Ionescu, M. Ionescu
Publisher	Trans Tech Publications Ltd
Pages	1760-1765
Number of pages	6
ISBN (Print)	0878492941, 9780878492947
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760
Publication status	Published - 2010
Externally published	Yes
Event	6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany Duration: 2009 Aug 25 → 2009 Aug 29

Publication series

Name	Materials Science Forum
Volume	638-642
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Conference

Conference	6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
Country/Territory	Germany
City	Berlin
Period	09/8/25 → 09/8/29

Keywords

Layered perovskite
Manganite
Orbital modulation
Transmission electron microscopy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.4028/www.scientific.net/MSF.638-642.1760

Cite this

Inoue, Y., Arao, M., Shindo, G., & Koyama, Y. (2010). Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd). In T. Chandra, T. Chandra, T. Chandra, N. Wanderka, N. Wanderka, N. Wanderka, W. Reimers, W. Reimers, W. Reimers, M. Ionescu, M. Ionescu, & M. Ionescu (Eds.), THERMEC 2009 (pp. 1760-1765). (Materials Science Forum; Vol. 638-642). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760

Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd). / Inoue, Yasuhide; Arao, Masazumi; Shindo, Go et al.
THERMEC 2009. ed. / Tara Chandra; Tara Chandra; Tara Chandra; N. Wanderka; N. Wanderka; N. Wanderka; Walter Reimers; Walter Reimers; Walter Reimers; M. Ionescu; M. Ionescu; M. Ionescu. Trans Tech Publications Ltd, 2010. p. 1760-1765 (Materials Science Forum; Vol. 638-642).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Inoue, Y, Arao, M, Shindo, G & Koyama, Y 2010, Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd). in T Chandra, T Chandra, T Chandra, N Wanderka, N Wanderka, N Wanderka, W Reimers, W Reimers, W Reimers, M Ionescu, M Ionescu & M Ionescu (eds), THERMEC 2009. Materials Science Forum, vol. 638-642, Trans Tech Publications Ltd, pp. 1760-1765, 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009, Berlin, Germany, 09/8/25. https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760

Inoue Y, Arao M, Shindo G, Koyama Y. Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd). In Chandra T, Chandra T, Chandra T, Wanderka N, Wanderka N, Wanderka N, Reimers W, Reimers W, Reimers W, Ionescu M, Ionescu M, Ionescu M, editors, THERMEC 2009. Trans Tech Publications Ltd. 2010. p. 1760-1765. (Materials Science Forum). doi: 10.4028/www.scientific.net/MSF.638-642.1760

Inoue, Yasuhide ; Arao, Masazumi ; Shindo, Go et al. / Stability of the orbital-modulated state in the layered perovskite manganite Sr_2-xR_xMnO₄ (R = Pr, Nd). THERMEC 2009. editor / Tara Chandra ; Tara Chandra ; Tara Chandra ; N. Wanderka ; N. Wanderka ; N. Wanderka ; Walter Reimers ; Walter Reimers ; Walter Reimers ; M. Ionescu ; M. Ionescu ; M. Ionescu. Trans Tech Publications Ltd, 2010. pp. 1760-1765 (Materials Science Forum).

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