High-temperature orbital and charge ordering in Bi<inf>1/2</inf>Sr<inf>1/2</inf>MnO<inf>3</inf>

J. L. García-Muñoz; C. Frontera; M. A.G. Aranda; A. Llobet; C. Ritter

doi:10.1103/PhysRevB.63.064415

High-temperature orbital and charge ordering in Bi<inf>1/2</inf>Sr<inf>1/2</inf>MnO<inf>3</inf>

J. L. García-Muñoz, C. Frontera, M. A.G. Aranda, A. Llobet, C. Ritter

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Abstract

We report a spectacularly high orbital/charge ordering temperature Tco = 475K, in Bi1/2Sr1/2MnO3. The charges order approximately 350K above the temperature predicted by the bandwidth tuning mechanism in the Ln1/2(Ca, Sr)1/2MnO3 family. This transition takes place 150K above that in Bi1/2Ca1/2MnO3 which is much more distorted. Strikingly, the TCO variation along the Bi1/2(Ca1-ySry)1/2MnO3 series (0 < ∼ y <∼ 1) is not monotonous but TCO suddenly jumps 150K for y≳0.5 compositions. Neutron and synchrotron diffraction data allow us to propose a new mechanism to justify this behavior. For compositions with high Sr content, the manifestation of the 6s2 character of the Bi3+ lone pair seems to markedly favor the charge ordering. © 2001 The American Physical Society.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	63
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.63.064415
Publication status	Published - 22 Jan 2001

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title = "High-temperature orbital and charge ordering in Bi1/2Sr1/2MnO3",

abstract = "We report a spectacularly high orbital/charge ordering temperature Tco = 475K, in Bi1/2Sr1/2MnO3. The charges order approximately 350K above the temperature predicted by the bandwidth tuning mechanism in the Ln1/2(Ca, Sr)1/2MnO3 family. This transition takes place 150K above that in Bi1/2Ca1/2MnO3 which is much more distorted. Strikingly, the TCO variation along the Bi1/2(Ca1-ySry)1/2MnO3 series (0 < ∼ y <∼ 1) is not monotonous but TCO suddenly jumps 150K for y≳0.5 compositions. Neutron and synchrotron diffraction data allow us to propose a new mechanism to justify this behavior. For compositions with high Sr content, the manifestation of the 6s2 character of the Bi3+ lone pair seems to markedly favor the charge ordering. {\textcopyright} 2001 The American Physical Society.",

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doi = "10.1103/PhysRevB.63.064415",

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T1 - High-temperature orbital and charge ordering in Bi1/2Sr1/2MnO3

AU - García-Muñoz, J. L.

AU - Frontera, C.

AU - Aranda, M. A.G.

AU - Llobet, A.

AU - Ritter, C.

PY - 2001/1/22

Y1 - 2001/1/22

N2 - We report a spectacularly high orbital/charge ordering temperature Tco = 475K, in Bi1/2Sr1/2MnO3. The charges order approximately 350K above the temperature predicted by the bandwidth tuning mechanism in the Ln1/2(Ca, Sr)1/2MnO3 family. This transition takes place 150K above that in Bi1/2Ca1/2MnO3 which is much more distorted. Strikingly, the TCO variation along the Bi1/2(Ca1-ySry)1/2MnO3 series (0 < ∼ y <∼ 1) is not monotonous but TCO suddenly jumps 150K for y≳0.5 compositions. Neutron and synchrotron diffraction data allow us to propose a new mechanism to justify this behavior. For compositions with high Sr content, the manifestation of the 6s2 character of the Bi3+ lone pair seems to markedly favor the charge ordering. © 2001 The American Physical Society.

AB - We report a spectacularly high orbital/charge ordering temperature Tco = 475K, in Bi1/2Sr1/2MnO3. The charges order approximately 350K above the temperature predicted by the bandwidth tuning mechanism in the Ln1/2(Ca, Sr)1/2MnO3 family. This transition takes place 150K above that in Bi1/2Ca1/2MnO3 which is much more distorted. Strikingly, the TCO variation along the Bi1/2(Ca1-ySry)1/2MnO3 series (0 < ∼ y <∼ 1) is not monotonous but TCO suddenly jumps 150K for y≳0.5 compositions. Neutron and synchrotron diffraction data allow us to propose a new mechanism to justify this behavior. For compositions with high Sr content, the manifestation of the 6s2 character of the Bi3+ lone pair seems to markedly favor the charge ordering. © 2001 The American Physical Society.

U2 - 10.1103/PhysRevB.63.064415

DO - 10.1103/PhysRevB.63.064415

M3 - Article

VL - 63

IS - 6

ER -

High-temperature orbital and charge ordering in Bi<inf>1/2</inf>Sr<inf>1/2</inf>MnO<inf>3</inf>

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