Space group determination of the BaY(Cu0.5Fe0.5)2O5+δ phase using a convergent-beam electron-diffraction technique

H. Suematsu; J. Lindén; M. Nagase; Y. Tomokiyo; M. Karppinen; H. Yamauchi

doi:10.1016/j.jssc.2004.01.006

Space group determination of the BaY(Cu_0.5Fe_0.5)₂O_5+δ phase using a convergent-beam electron-diffraction technique

H. Suematsu^*
, J. Lindén
, M. Nagase
, Y. Tomokiyo
, M. Karppinen
, H. Yamauchi

^*Korresponderande författare för detta arbete

Fysik

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

4 Citeringar (Scopus)

Sammanfattning

The space group of the BaY(Cu_0.5Fe_0.5) ₂O_5+δ (δ=0.03-0.17) phase was studied by selected-area electron diffraction and convergent-beam electron diffraction (CBED). The CBED patterns for BaY(Cu_0.5Fe_0.5) ₂O_5.03 grains taken from the zone axes of [111], [001] and [010] had the symmetries of m, 4mm and 2mm, respectively. Forbidden reflections were observed neither in selected-area electron diffraction nor in the CBED patterns. From these results, the space group of the BaY(Cu_0.5Fe _0.5)₂O_5.03 was determined to be P4/mmm. Since the presence of a mirror plane parallel to the (Cu,Fe)O₂ planes was confirmed, Cu and Fe were found to be randomly distributed in the (Cu,Fe)O ₂ planes. The same analyses were performed for BaY(Cu _0.5Fe_0.5)₂O_5.17 grains and the space group was also found to be P4/mmm. The change in the magnetic properties of BaY(Cu_0.5Fe_0.5)₂O_5+δ samples due to the high-pressure heat-treatment was concluded to be caused by excess of oxygen.

Originalspråk	Engelska
Sidor (från-till)	1958-1964
Antal sidor	7
Tidskrift	Journal of Solid State Chemistry
Volym	177
Nummer	6
DOI	https://doi.org/10.1016/j.jssc.2004.01.006
Status	Publicerad - juni 2004
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

This work was supported by a Grant-in-Aid for Scientific Research under contract No. 0855299 from The Ministry of Education, Science and Culture of Japan and also by a Collaborative Research Project Grant-1998 of the Materials and Structures Laboratory, Tokyo Institute of Technology. One of the authors (J.L.) acknowledges support from the Japan Society for the Promotion of Science.

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10.1016/j.jssc.2004.01.006

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@article{4f79615f0afe4775864f5c20a559ca51,

title = "Space group determination of the BaY(Cu0.5Fe0.5)2O5+δ phase using a convergent-beam electron-diffraction technique",

abstract = "The space group of the BaY(Cu0.5Fe0.5) 2O5+δ (δ=0.03-0.17) phase was studied by selected-area electron diffraction and convergent-beam electron diffraction (CBED). The CBED patterns for BaY(Cu0.5Fe0.5) 2O5.03 grains taken from the zone axes of [111], [001] and [010] had the symmetries of m, 4mm and 2mm, respectively. Forbidden reflections were observed neither in selected-area electron diffraction nor in the CBED patterns. From these results, the space group of the BaY(Cu0.5Fe 0.5)2O5.03 was determined to be P4/mmm. Since the presence of a mirror plane parallel to the (Cu,Fe)O2 planes was confirmed, Cu and Fe were found to be randomly distributed in the (Cu,Fe)O 2 planes. The same analyses were performed for BaY(Cu 0.5Fe0.5)2O5.17 grains and the space group was also found to be P4/mmm. The change in the magnetic properties of BaY(Cu0.5Fe0.5)2O5+δ samples due to the high-pressure heat-treatment was concluded to be caused by excess of oxygen.",

keywords = "BaY(CuFe)O, Convergent-beam electron diffraction, High-pressure heat-treatment, Magnetic property, Space group",

author = "H. Suematsu and J. Lind{\'e}n and M. Nagase and Y. Tomokiyo and M. Karppinen and H. Yamauchi",

year = "2004",

month = jun,

doi = "10.1016/j.jssc.2004.01.006",

language = "English",

volume = "177",

pages = "1958--1964",

journal = "Journal of Solid State Chemistry",

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publisher = "Elsevier",

number = "6",

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T1 - Space group determination of the BaY(Cu0.5Fe0.5)2O5+δ phase using a convergent-beam electron-diffraction technique

AU - Suematsu, H.

AU - Lindén, J.

AU - Nagase, M.

AU - Tomokiyo, Y.

AU - Karppinen, M.

AU - Yamauchi, H.

PY - 2004/6

Y1 - 2004/6

N2 - The space group of the BaY(Cu0.5Fe0.5) 2O5+δ (δ=0.03-0.17) phase was studied by selected-area electron diffraction and convergent-beam electron diffraction (CBED). The CBED patterns for BaY(Cu0.5Fe0.5) 2O5.03 grains taken from the zone axes of [111], [001] and [010] had the symmetries of m, 4mm and 2mm, respectively. Forbidden reflections were observed neither in selected-area electron diffraction nor in the CBED patterns. From these results, the space group of the BaY(Cu0.5Fe 0.5)2O5.03 was determined to be P4/mmm. Since the presence of a mirror plane parallel to the (Cu,Fe)O2 planes was confirmed, Cu and Fe were found to be randomly distributed in the (Cu,Fe)O 2 planes. The same analyses were performed for BaY(Cu 0.5Fe0.5)2O5.17 grains and the space group was also found to be P4/mmm. The change in the magnetic properties of BaY(Cu0.5Fe0.5)2O5+δ samples due to the high-pressure heat-treatment was concluded to be caused by excess of oxygen.

AB - The space group of the BaY(Cu0.5Fe0.5) 2O5+δ (δ=0.03-0.17) phase was studied by selected-area electron diffraction and convergent-beam electron diffraction (CBED). The CBED patterns for BaY(Cu0.5Fe0.5) 2O5.03 grains taken from the zone axes of [111], [001] and [010] had the symmetries of m, 4mm and 2mm, respectively. Forbidden reflections were observed neither in selected-area electron diffraction nor in the CBED patterns. From these results, the space group of the BaY(Cu0.5Fe 0.5)2O5.03 was determined to be P4/mmm. Since the presence of a mirror plane parallel to the (Cu,Fe)O2 planes was confirmed, Cu and Fe were found to be randomly distributed in the (Cu,Fe)O 2 planes. The same analyses were performed for BaY(Cu 0.5Fe0.5)2O5.17 grains and the space group was also found to be P4/mmm. The change in the magnetic properties of BaY(Cu0.5Fe0.5)2O5+δ samples due to the high-pressure heat-treatment was concluded to be caused by excess of oxygen.

KW - BaY(CuFe)O

KW - Convergent-beam electron diffraction

KW - High-pressure heat-treatment

KW - Magnetic property

KW - Space group

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