Structural phase transitions and the effect on Pr anomalous ordering for the PrBa2-xLaxCu3O7+y system

H. C. Ku; H. M. Luo; Y. P. Chi; B. N. Lin; Y. Y. Hsu; C. H. Lin; H. C.I. Kao

doi:10.1016/S0921-4526(99)00784-X

Structural phase transitions and the effect on Pr anomalous ordering for the PrBa_2-xLa_xCu₃O_7+y system

H. C. Ku^*, H. M. Luo, Y. P. Chi, B. N. Lin, Y. Y. Hsu, C. H. Lin, H. C.I. Kao

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

Complex crystal symmetry variation is observed for the oxygenated PrBa_2-xLa_xCu₃O_7+y system (0≤x≤1, -0.12≤y≤0.39). Powder X-ray Rietveld analysis indicates that the crystal structure changes from the PrBa₂Cu₃O₇ or CuBa₂PrCu₂O₇ 1212C-type (C for chain) orthorhombic O(I)-phase (space group Pmmm) to 1212-type tetragonal T-phase (P4/mmm) around x = 0.45, and then to a new 1212-type of orthorhombic O(II)-phase (Cmmm) around x = 0.65. However, regardless of the structural change, anomalous Pr ordering temperature T_N(Pr) decreases monotonically from 18 K for PrBa₂Cu₃O_6.88 to 2.8 K for PrBa_1.3La_0.7Cu₃O_7.24. The increasing Pr-O bond length with decreasing T_N indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2p_π orbital in the CuO₂ bi-layers.

Original language	English
Pages (from-to)	892-893
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	281-282
DOIs	https://doi.org/10.1016/S0921-4526(99)00784-X
Publication status	Published - 2000 Jun 1
Externally published	Yes
Event	Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Jpn Duration: 1999 Aug 24 → 1999 Aug 28

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(99)00784-X

Cite this

@article{f9bf287c03714312b2ce17cfde260b95,

title = "Structural phase transitions and the effect on Pr anomalous ordering for the PrBa2-xLaxCu3O7+y system",

abstract = "Complex crystal symmetry variation is observed for the oxygenated PrBa2-xLaxCu3O7+y system (0≤x≤1, -0.12≤y≤0.39). Powder X-ray Rietveld analysis indicates that the crystal structure changes from the PrBa2Cu3O7 or CuBa2PrCu2O7 1212C-type (C for chain) orthorhombic O(I)-phase (space group Pmmm) to 1212-type tetragonal T-phase (P4/mmm) around x = 0.45, and then to a new 1212-type of orthorhombic O(II)-phase (Cmmm) around x = 0.65. However, regardless of the structural change, anomalous Pr ordering temperature TN(Pr) decreases monotonically from 18 K for PrBa2Cu3O6.88 to 2.8 K for PrBa1.3La0.7Cu3O7.24. The increasing Pr-O bond length with decreasing TN indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2pπ orbital in the CuO2 bi-layers.",

author = "Ku, {H. C.} and Luo, {H. M.} and Chi, {Y. P.} and Lin, {B. N.} and Hsu, {Y. Y.} and Lin, {C. H.} and Kao, {H. C.I.}",

note = "Funding Information: The research is supported by NSC88-2112-M007-003 and -033.; Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) ; Conference date: 24-08-1999 Through 28-08-1999",

year = "2000",

month = jun,

day = "1",

doi = "10.1016/S0921-4526(99)00784-X",

language = "English",

volume = "281-282",

pages = "892--893",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

T1 - Structural phase transitions and the effect on Pr anomalous ordering for the PrBa2-xLaxCu3O7+y system

AU - Ku, H. C.

AU - Luo, H. M.

AU - Chi, Y. P.

AU - Lin, B. N.

AU - Hsu, Y. Y.

AU - Lin, C. H.

AU - Kao, H. C.I.

N1 - Funding Information: The research is supported by NSC88-2112-M007-003 and -033.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - Complex crystal symmetry variation is observed for the oxygenated PrBa2-xLaxCu3O7+y system (0≤x≤1, -0.12≤y≤0.39). Powder X-ray Rietveld analysis indicates that the crystal structure changes from the PrBa2Cu3O7 or CuBa2PrCu2O7 1212C-type (C for chain) orthorhombic O(I)-phase (space group Pmmm) to 1212-type tetragonal T-phase (P4/mmm) around x = 0.45, and then to a new 1212-type of orthorhombic O(II)-phase (Cmmm) around x = 0.65. However, regardless of the structural change, anomalous Pr ordering temperature TN(Pr) decreases monotonically from 18 K for PrBa2Cu3O6.88 to 2.8 K for PrBa1.3La0.7Cu3O7.24. The increasing Pr-O bond length with decreasing TN indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2pπ orbital in the CuO2 bi-layers.

AB - Complex crystal symmetry variation is observed for the oxygenated PrBa2-xLaxCu3O7+y system (0≤x≤1, -0.12≤y≤0.39). Powder X-ray Rietveld analysis indicates that the crystal structure changes from the PrBa2Cu3O7 or CuBa2PrCu2O7 1212C-type (C for chain) orthorhombic O(I)-phase (space group Pmmm) to 1212-type tetragonal T-phase (P4/mmm) around x = 0.45, and then to a new 1212-type of orthorhombic O(II)-phase (Cmmm) around x = 0.65. However, regardless of the structural change, anomalous Pr ordering temperature TN(Pr) decreases monotonically from 18 K for PrBa2Cu3O6.88 to 2.8 K for PrBa1.3La0.7Cu3O7.24. The increasing Pr-O bond length with decreasing TN indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2pπ orbital in the CuO2 bi-layers.

UR - http://www.scopus.com/inward/record.url?scp=0033876291&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033876291&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(99)00784-X

DO - 10.1016/S0921-4526(99)00784-X

M3 - Conference article

AN - SCOPUS:0033876291

SN - 0921-4526

VL - 281-282

SP - 892

EP - 893

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)

Y2 - 24 August 1999 through 28 August 1999

ER -

Structural phase transitions and the effect on Pr anomalous ordering for the PrBa_2-xLa_xCu₃O_7+y system

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this