Direct observation of nanoscale phase separation in la 1-xca xmno 3 using scanning electron nanodiffraction

J. Tao; D. Niebieskikwiat; M. Varela; W. Luo; M. Schofield; Y. Zhu; M. B. Salamon; S. T. Pantelides; J. M. Zuo; S. J. Pennycook

doi:10.1017/S1431927609097608

Direct observation of nanoscale phase separation in la _1-xca _xmno ₃ using scanning electron nanodiffraction

J. Tao, D. Niebieskikwiat, M. Varela, W. Luo, M. Schofield, Y. Zhu, M. B. Salamon, S. T. Pantelides, J. M. Zuo, S. J. Pennycook

Research output: Contribution to journal › Article › peer-review

Original language	English (US)
Pages (from-to)	750-751
Number of pages	2
Journal	Microscopy and Microanalysis
Volume	15
Issue number	SUPPL. 2
DOIs	https://doi.org/10.1017/S1431927609097608
State	Published - Jul 2009

ASJC Scopus subject areas

Instrumentation

Online availability

10.1017/S1431927609097608

Library availability

Discover UIUC Full Text

Cite this

@article{ec063ba552c4426f88fc07d29b29bc62,

title = "Direct observation of nanoscale phase separation in la 1-xca xmno 3 using scanning electron nanodiffraction",

author = "J. Tao and D. Niebieskikwiat and M. Varela and W. Luo and M. Schofield and Y. Zhu and Salamon, {M. B.} and Pantelides, {S. T.} and Zuo, {J. M.} and Pennycook, {S. J.}",

note = "Funding Information: In this talk, we report the direct observations of the CO nanoscale phase using scanning electron nanodiffraction (SEND). This technique employs an electron probe ~ 1.7 nm in size and which is scanned over the manganite crystals. At each location of the scanning area, an electron nanodiffraction (END) pattern was recorded by a CCD camera, showing the CO superlattice reflections (Fig. 1A, corresponding to the electron probe sitting on the CO nanoscale phase) or no CO superlattice reflection (Fig. 1B, corresponding to the electron probe sitting off the CO nanoscale phase). By mapping the intensity of the CO superlattice reflections, the CO phase in the form of nanoclusters was revealed in real space (Fig. 2). The evolution of the CO nanoclusters during the phase transitions at various doping levels was studied using the SEND maps at different temperatures. We estimated the volume fraction of the CO phase as a function of temperature from the SEND maps and the appearance of CO nanoclusters correlates with the CMR effect. Moreover, the mechanism of the formation of the CO nanoclusters and the discovery of an anomalous short range CO in these materials will be discussed. [2] [1]. P. Dai et al., Phys. Rev. Lett. 85, 2553 (2000); C. P. Adams et al., ibid. 85, 3954 (2000); J. M. Zuo, J. Tao, Phys. Rev. B 63, 060407 (2001) [2]. Research sponsored by the Office of Basic Energy Sciences, Division of Materials Sciences and Engineering and by appointment to the ORNL Postdoctoral Research Program administered jointly by ORNL and ORISE. Work at BNL was supported by the U.S. DOE/BES under Contract No. DE-AC02-98CH10886.",

year = "2009",

month = jul,

doi = "10.1017/S1431927609097608",

language = "English (US)",

volume = "15",

pages = "750--751",

journal = "Microscopy and Microanalysis",

issn = "1431-9276",

publisher = "Cambridge University Press",

number = "SUPPL. 2",

}

TY - JOUR

T1 - Direct observation of nanoscale phase separation in la 1-xca xmno 3 using scanning electron nanodiffraction

AU - Tao, J.

AU - Niebieskikwiat, D.

AU - Varela, M.

AU - Luo, W.

AU - Schofield, M.

AU - Zhu, Y.

AU - Salamon, M. B.

AU - Pantelides, S. T.

AU - Zuo, J. M.

AU - Pennycook, S. J.

N1 - Funding Information: In this talk, we report the direct observations of the CO nanoscale phase using scanning electron nanodiffraction (SEND). This technique employs an electron probe ~ 1.7 nm in size and which is scanned over the manganite crystals. At each location of the scanning area, an electron nanodiffraction (END) pattern was recorded by a CCD camera, showing the CO superlattice reflections (Fig. 1A, corresponding to the electron probe sitting on the CO nanoscale phase) or no CO superlattice reflection (Fig. 1B, corresponding to the electron probe sitting off the CO nanoscale phase). By mapping the intensity of the CO superlattice reflections, the CO phase in the form of nanoclusters was revealed in real space (Fig. 2). The evolution of the CO nanoclusters during the phase transitions at various doping levels was studied using the SEND maps at different temperatures. We estimated the volume fraction of the CO phase as a function of temperature from the SEND maps and the appearance of CO nanoclusters correlates with the CMR effect. Moreover, the mechanism of the formation of the CO nanoclusters and the discovery of an anomalous short range CO in these materials will be discussed. [2] [1]. P. Dai et al., Phys. Rev. Lett. 85, 2553 (2000); C. P. Adams et al., ibid. 85, 3954 (2000); J. M. Zuo, J. Tao, Phys. Rev. B 63, 060407 (2001) [2]. Research sponsored by the Office of Basic Energy Sciences, Division of Materials Sciences and Engineering and by appointment to the ORNL Postdoctoral Research Program administered jointly by ORNL and ORISE. Work at BNL was supported by the U.S. DOE/BES under Contract No. DE-AC02-98CH10886.

PY - 2009/7

Y1 - 2009/7

UR - http://www.scopus.com/inward/record.url?scp=69949190086&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69949190086&partnerID=8YFLogxK

U2 - 10.1017/S1431927609097608

DO - 10.1017/S1431927609097608

M3 - Article

AN - SCOPUS:69949190086

SN - 1431-9276

VL - 15

SP - 750

EP - 751

JO - Microscopy and Microanalysis

JF - Microscopy and Microanalysis

IS - SUPPL. 2

ER -