Ferroelastic domain structures of the low-temperature phase transition in TlH2PO4

Kum Bae Kim, Kwang Sei Lee, Cheol Eui Lee

Research output: Contribution to journalArticle

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Abstract

The low-temperature II-III phase transition of TlH2PO4 (ferroelastic in phase II) at 230 K (Tc2) was studied by a polarizing microscope between 300 and 80 K. Despite the II-III phase transition at Tc2, the two kinds of ferroelastic domain structures with the (100) and/or (001) and (201) domain boundaries were still observed below Tc2 and were nearly temperature-independent. No new domain structures corresponding to antiferroelectric or ferrielectric orientation states were observed in phase III. The possible intermediate structural phase transition near 130 K suggested by vibrational spectroscopic study [B. Pasquier et al.: Chem. Phys. 171 (1993) 203] was not detected. The transition at Tc2 without optically detectable new domains indicates that the monoclinic crystal system of the phase II persists in phase III from 300 to 80 K and that the nature of the II-III phase transition of TlH2PO4 is not ferroic, but is nonferroic.

Original languageEnglish
Pages (from-to)1886-1889
Number of pages4
JournalJournal of the Physical Society of Japan
Volume67
Issue number6
Publication statusPublished - 1998 Jun 1

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microscopes
crystals
temperature

Keywords

  • Antiferroelectric
  • Ferrielectric
  • Ferroelastic domain structures
  • Nonferroic
  • Phase transition
  • TlHPO

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ferroelastic domain structures of the low-temperature phase transition in TlH2PO4 . / Kim, Kum Bae; Lee, Kwang Sei; Lee, Cheol Eui.

In: Journal of the Physical Society of Japan, Vol. 67, No. 6, 01.06.1998, p. 1886-1889.

Research output: Contribution to journalArticle

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N2 - The low-temperature II-III phase transition of TlH2PO4 (ferroelastic in phase II) at 230 K (Tc2) was studied by a polarizing microscope between 300 and 80 K. Despite the II-III phase transition at Tc2, the two kinds of ferroelastic domain structures with the (100) and/or (001) and (201) domain boundaries were still observed below Tc2 and were nearly temperature-independent. No new domain structures corresponding to antiferroelectric or ferrielectric orientation states were observed in phase III. The possible intermediate structural phase transition near 130 K suggested by vibrational spectroscopic study [B. Pasquier et al.: Chem. Phys. 171 (1993) 203] was not detected. The transition at Tc2 without optically detectable new domains indicates that the monoclinic crystal system of the phase II persists in phase III from 300 to 80 K and that the nature of the II-III phase transition of TlH2PO4 is not ferroic, but is nonferroic.

AB - The low-temperature II-III phase transition of TlH2PO4 (ferroelastic in phase II) at 230 K (Tc2) was studied by a polarizing microscope between 300 and 80 K. Despite the II-III phase transition at Tc2, the two kinds of ferroelastic domain structures with the (100) and/or (001) and (201) domain boundaries were still observed below Tc2 and were nearly temperature-independent. No new domain structures corresponding to antiferroelectric or ferrielectric orientation states were observed in phase III. The possible intermediate structural phase transition near 130 K suggested by vibrational spectroscopic study [B. Pasquier et al.: Chem. Phys. 171 (1993) 203] was not detected. The transition at Tc2 without optically detectable new domains indicates that the monoclinic crystal system of the phase II persists in phase III from 300 to 80 K and that the nature of the II-III phase transition of TlH2PO4 is not ferroic, but is nonferroic.

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