Model for the magnetic phases observed at low temperatures in reduced YBa2Cu3O6+x materials with Al substitution for Cu or rare earth ions for Ba

N.H. Andersen; G. Uimin

doi:10.1016/S0921-4534(97)00704-1

Model for the magnetic phases observed at low temperatures in reduced YBa₂Cu₃O₆₊_x materials with Al substitution for Cu or rare earth ions for Ba

N.H. Andersen, G. Uimin

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

Abstract

From a classical statistical model it is shown that the low temperature antiferromagnetic AFII phase, observed in reduced YBa2Cu3O6+x type materials with Al in the CuOx basal plane or rare earth on the Ba site, results from an effective ferromagnetic coupling between adjacent CuO2 double layers mediated by polarization of free spins in the basal plane. At higher temperature the ferromagnetic coupling becomes ineffective and the spin structure transforms via intermediate Turn Angle phases into the high temperature AFI phase.

Original language	English
Journal	Physica C
Volume	282-287
Issue number	Part 3
Pages (from-to)	1289-1290
ISSN	0921-4534
DOIs	https://doi.org/10.1016/S0921-4534(97)00704-1
Publication status	Published - 1997
Event	5th International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors - Beijing, China Duration: 28 Feb 1997 → 4 Mar 1997 Conference number: 5 http://www.saxo.com/dk/materials-and-mechanisms-of-superconductivity-high-temperature-superconductors_yu-sheng-he_hardback_9780444828354

Conference

Conference	5th International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors
Number	5
Country/Territory	China
City	Beijing
Period	28/02/1997 → 04/03/1997
Internet address	http://www.saxo.com/dk/materials-and-mechanisms-of-superconductivity-high-temperature-superconductors_yu-sheng-he_hardback_9780444828354

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10.1016/S0921-4534(97)00704-1

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title = "Model for the magnetic phases observed at low temperatures in reduced YBa2Cu3O6+x materials with Al substitution for Cu or rare earth ions for Ba",

abstract = "From a classical statistical model it is shown that the low temperature antiferromagnetic AFII phase, observed in reduced YBa2Cu3O6+x type materials with Al in the CuOx basal plane or rare earth on the Ba site, results from an effective ferromagnetic coupling between adjacent CuO2 double layers mediated by polarization of free spins in the basal plane. At higher temperature the ferromagnetic coupling becomes ineffective and the spin structure transforms via intermediate Turn Angle phases into the high temperature AFI phase.",

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doi = "10.1016/S0921-4534(97)00704-1",

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AU - Andersen, N.H.

AU - Uimin, G.

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PY - 1997

Y1 - 1997

N2 - From a classical statistical model it is shown that the low temperature antiferromagnetic AFII phase, observed in reduced YBa2Cu3O6+x type materials with Al in the CuOx basal plane or rare earth on the Ba site, results from an effective ferromagnetic coupling between adjacent CuO2 double layers mediated by polarization of free spins in the basal plane. At higher temperature the ferromagnetic coupling becomes ineffective and the spin structure transforms via intermediate Turn Angle phases into the high temperature AFI phase.

AB - From a classical statistical model it is shown that the low temperature antiferromagnetic AFII phase, observed in reduced YBa2Cu3O6+x type materials with Al in the CuOx basal plane or rare earth on the Ba site, results from an effective ferromagnetic coupling between adjacent CuO2 double layers mediated by polarization of free spins in the basal plane. At higher temperature the ferromagnetic coupling becomes ineffective and the spin structure transforms via intermediate Turn Angle phases into the high temperature AFI phase.

KW - Nye funktionelle materialer

U2 - 10.1016/S0921-4534(97)00704-1

DO - 10.1016/S0921-4534(97)00704-1

M3 - Conference article

SN - 0921-4534

VL - 282-287

SP - 1289

EP - 1290

JO - Physica C

JF - Physica C

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T2 - 5th International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors

Y2 - 28 February 1997 through 4 March 1997

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