Effect of crystal symmetry on O′-phase weak ferromagnetism

H. C. Ku; H. M. Luo; B. N. Lin; Y. P. Chi; Y. Y. Hsu; Y. P. Sun; T. J. Lee

doi:10.1016/S0921-4526(99)02514-4

Effect of crystal symmetry on O′-phase weak ferromagnetism

H. C. Ku^*
, H. M. Luo
, B. N. Lin
, Y. P. Chi
, Y. Y. Hsu
, Y. P. Sun
, T. J. Lee

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

Correlation between copper weak-ferromagnetic/canted-antiferromagnetic (WF/CAF) order and structural symmetry of the Gd_2-xR_xCuO₄ (R = Eu and Tb) systems is reported. With smaller rare earth ions, lattice mismatch between (Gd, R)₂ O₂ and CuO₂ layers results in a small oxygen distortion in square CuO₂ plane. The distortion lowers the crystal symmetry from tetragonal T′- to an orthorhombic O′-phase. The weak ferromagnetism is a direct result of such a non-180° α(Cu-O-Cu) coupling with CAF alignment and a WF saturation moment m_s(Cu²⁺) = μ(Cu²⁺) sin θ, with canting angle θ = (π - α)/2. Magnetic and crystallographic data indicate that the magnetic moment m(T) and the canting angle θ decrease (increase) with larger (smaller) ion doping.

Original language	English
Pages (from-to)	1373-1374
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART II
DOIs	https://doi.org/10.1016/S0921-4526(99)02514-4
Publication status	Published - 2000
Externally published	Yes

Keywords

GdRCuO
O'-phase
Weak ferromagnetism

ASJC Scopus subject areas

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

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10.1016/S0921-4526(99)02514-4

Cite this

@article{5b6b6b4ed3f04747846a7f228d4ffb36,

title = "Effect of crystal symmetry on O′-phase weak ferromagnetism",

abstract = "Correlation between copper weak-ferromagnetic/canted-antiferromagnetic (WF/CAF) order and structural symmetry of the Gd2-xRxCuO4 (R = Eu and Tb) systems is reported. With smaller rare earth ions, lattice mismatch between (Gd, R)2 O2 and CuO2 layers results in a small oxygen distortion in square CuO2 plane. The distortion lowers the crystal symmetry from tetragonal T′- to an orthorhombic O′-phase. The weak ferromagnetism is a direct result of such a non-180° α(Cu-O-Cu) coupling with CAF alignment and a WF saturation moment ms(Cu2+) = μ(Cu2+) sin θ, with canting angle θ = (π - α)/2. Magnetic and crystallographic data indicate that the magnetic moment m(T) and the canting angle θ decrease (increase) with larger (smaller) ion doping.",

keywords = "GdRCuO, O'-phase, Weak ferromagnetism",

author = "Ku, \{H. C.\} and Luo, \{H. M.\} and Lin, \{B. N.\} and Chi, \{Y. P.\} and Hsu, \{Y. Y.\} and Sun, \{Y. P.\} and Lee, \{T. J.\}",

year = "2000",

doi = "10.1016/S0921-4526(99)02514-4",

language = "English",

volume = "284-288",

pages = "1373--1374",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier BV",

number = "PART II",

}

TY - JOUR

T1 - Effect of crystal symmetry on O′-phase weak ferromagnetism

AU - Ku, H. C.

AU - Luo, H. M.

AU - Lin, B. N.

AU - Chi, Y. P.

AU - Hsu, Y. Y.

AU - Sun, Y. P.

AU - Lee, T. J.

PY - 2000

Y1 - 2000

N2 - Correlation between copper weak-ferromagnetic/canted-antiferromagnetic (WF/CAF) order and structural symmetry of the Gd2-xRxCuO4 (R = Eu and Tb) systems is reported. With smaller rare earth ions, lattice mismatch between (Gd, R)2 O2 and CuO2 layers results in a small oxygen distortion in square CuO2 plane. The distortion lowers the crystal symmetry from tetragonal T′- to an orthorhombic O′-phase. The weak ferromagnetism is a direct result of such a non-180° α(Cu-O-Cu) coupling with CAF alignment and a WF saturation moment ms(Cu2+) = μ(Cu2+) sin θ, with canting angle θ = (π - α)/2. Magnetic and crystallographic data indicate that the magnetic moment m(T) and the canting angle θ decrease (increase) with larger (smaller) ion doping.

AB - Correlation between copper weak-ferromagnetic/canted-antiferromagnetic (WF/CAF) order and structural symmetry of the Gd2-xRxCuO4 (R = Eu and Tb) systems is reported. With smaller rare earth ions, lattice mismatch between (Gd, R)2 O2 and CuO2 layers results in a small oxygen distortion in square CuO2 plane. The distortion lowers the crystal symmetry from tetragonal T′- to an orthorhombic O′-phase. The weak ferromagnetism is a direct result of such a non-180° α(Cu-O-Cu) coupling with CAF alignment and a WF saturation moment ms(Cu2+) = μ(Cu2+) sin θ, with canting angle θ = (π - α)/2. Magnetic and crystallographic data indicate that the magnetic moment m(T) and the canting angle θ decrease (increase) with larger (smaller) ion doping.

KW - GdRCuO

KW - O'-phase

KW - Weak ferromagnetism

UR - https://www.scopus.com/pages/publications/0033716549

UR - https://www.scopus.com/pages/publications/0033716549#tab=citedBy

U2 - 10.1016/S0921-4526(99)02514-4

DO - 10.1016/S0921-4526(99)02514-4

M3 - Article

AN - SCOPUS:0033716549

SN - 0921-4526

VL - 284-288

SP - 1373

EP - 1374

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART II

ER -

Effect of crystal symmetry on O′-phase weak ferromagnetism

Abstract

Keywords

ASJC Scopus subject areas

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