Freezing of anisotropic spin clusters in La{sub 1.98}Sr{sub 0.02}CuO{sub 4}

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.61.4326· OSTI ID:20215488

Matsuda, M ^[1]; Lee, Y S ^[2]; Greven, M ^[2]; Kastner, M A ^[2]; Birgeneau, R J ^[2]; Yamada, K ^[3]; Endoh, Y ^[3]; Boeni, P ^[4]; Lee, S -H ^[5]; Wakimoto, S ^[6]

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1. The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, (Japan)
2. Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
3. Department of Physics, Tohoku University, Sendai 980-0812, (Japan)
4. Laboratory for Neutron Scattering, PSI, CH-5232 Villigen PSI, (Switzerland)
5. National Institute of Standards and Technology, NIST Center for Neutron Research, Gaithersburg, Maryland 20899 (United States)
6. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)

A spin-glass compound, La{sub 1.98}Sr{sub 0.02}CuO{sub 4}, shows quasi-three-dimensional magnetic ordering below {approx}40 K. A remarkable feature is that the magnetic correlation length along the orthorhombic a{sub ortho} axis is much longer than that along the b{sub ortho} axis, suggesting that the spin structure is closely related to the diagonal stripe structure. The spin-glass state can be expressed as a random freezing of quasi-three-dimensional spin clusters with anisotropic spin correlations ({xi}{sub a}{sup '}{approx}160 Aa , {xi}{sub b}{sup '}{approx}25 Aa , and {xi}{sub c}{sup '}{approx}4.7 Aa at 1.6 K). The new magnetic state is important as an intermediate phase between the three-dimensional antiferromagnetic ordered phase in La{sub 2}CuO{sub 4} and the incommensurate phase in La{sub 1.95}Sr{sub 0.05}CuO{sub 4} in which the positions of the incommensurate peaks are rotated by 45 degree sign in reciprocal space about ({pi},{pi}) from those observed in the superconducting La{sub 2}CuO{sub 4} compounds. (c) 2000 The American Physical Society.

• OSTI ID: 20215488
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 6 Vol. 61; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
COPPER OXIDES
EXCITATION
EXPERIMENTAL DATA
FREEZING
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
SPIN GLASS STATE
STRONTIUM OXIDES
SUPERCONDUCTIVITY