2016
DOI: 10.1080/21663831.2016.1197858
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Stress-induced charge-ordering process in LiMn2O4

Abstract: In this letter we report the stress induced Mn charge-ordering process in the LiMn 2 O 4 spinel, evidenced by the lattice strain evolutions due to the Jahn-Teller effects. In-situ neutron diffraction, reveals that the initial stage of this process at low stress, indicating the e g electron localization at the preferential Mn sites during the early phase transition, as an underlying charge ordering mechanism in the charge-frustrated LiMn 2 O 4 . The initial stage of this transition exhibits as a progressive lat… Show more

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Cited by 10 publications
(3 citation statements)
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References 29 publications
(84 reference statements)
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“…The lattice strain Ɛ of individual phases was calculated by Ɛx = (Lx -Lx,0) / Lx,0 along a principal (i.e. crystallographic) axis, where the reference Lx,0 under zero stress was estimated using the result before loading [37]. The corresponding microstress (σx) of a phase along the particular axis was obtained by σx = Ex • Ɛx, where Ex is the elastic diffraction constant.…”
Section: Load Partitioning and Sharing Studied Through In-situ Neutromentioning
confidence: 99%
“…The lattice strain Ɛ of individual phases was calculated by Ɛx = (Lx -Lx,0) / Lx,0 along a principal (i.e. crystallographic) axis, where the reference Lx,0 under zero stress was estimated using the result before loading [37]. The corresponding microstress (σx) of a phase along the particular axis was obtained by σx = Ex • Ɛx, where Ex is the elastic diffraction constant.…”
Section: Load Partitioning and Sharing Studied Through In-situ Neutromentioning
confidence: 99%
“…Thanks to the high flux and deep penetration of the time-of-flight (TOF) neutrons, real-time in situ study is facilitated with complex sample environment equipped enabling loading [15][16][17][18][19][20][21][22][23][24], heating/cooling [25,26] charging [27,28] etc. as well as their combinations [29][30][31][32].…”
Section: Introductionmentioning
confidence: 99%
“…In situ neutron diffraction experiments were performed using a time-of-flight diffractometer, Vulcan, at Oak Ridge National Laboratory [36]. To dynamically observe the SIMT in granular packings [34], an encapsulated die consisting of two high-strength maraging steel rams and an aluminum or steel sleeve was employed (diagram shown in Fig. 2(a)).…”
Section: In Situ Neutron Diffraction Experimentsmentioning
confidence: 99%