Magnetic ordering in electronically phase-separated La2-xSrxCuO4+y: Neutron diffraction experiments

被引：9

作者：

Udby, L. ^{[1
]}

Andersen, N. H. ^{[1
]}

Chou, F. C. ^{[2
]}

Christensen, N. B. ^{[1
,3
,4
,5
]}

Emery, S. B. ^{[6
]}

Lefmann, K. ^{[1
,5
,7
]}

Lynn, J. W. ^{[8
]}

Mohottala, H. E. ^{[6
]}

Niedermayer, Ch. ^{[3
,4
]}

Wells, B. O. ^{[6
]}

机构：

[1] Tech Univ Denmark, Riso DTU, Mat Res Div, DK-4000 Roskilde, Denmark

[2] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

[3] ETHZ, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] PSI, CH-5232 Villigen, Switzerland

[5] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-2100 Copenhagen, Denmark

[6] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

[7] Lund Univ, ESS Scandinavia, S-22350 Lund, Sweden

[8] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 01期

基金：

美国国家科学基金会;

关键词：

antiferromagnetic materials; doping; high-temperature superconductors; lanthanum compounds; long-range order; magnetic structure; magnetic superconductors; neutron diffraction; spin density waves; strontium compounds; superconducting transition temperature; MONOCHROMATIC IMAGING MODE; SPIN; LA2CUO4+DELTA; SPECTROMETER; TEMPERATURE; DEPENDENCE; SCATTERING; FIELD;

D O I：

10.1103/PhysRevB.80.014505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present results of magnetic neutron diffraction experiments on the codoped superoxygenated La2-xSrxCuO4+y (LSCO+O) system with x=0.09. We find that the magnetic phase is long-range ordered incommensurate antiferromagnetic with a Neacuteel temperature T-N coinciding with the superconducting ordering temperature T-c=40 K. The incommensurability value is consistent with a hole doping of n(h)approximate to 1>8 but in contrast to nonsuperoxygenated La2-xSrxCuO4 with hole doping close to n(h)approximate to 18 the magnetic-order parameter is not field dependent. We attribute this to the magnetic order being fully developed in LSCO+O as in the spin and charge ordered "stripe" compounds La1.48Nd0.40Sr0.12CuO4 and La7/8Ba1/8CuO4.

引用

页数：5

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