Muon-spin-relaxation and neutron-scattering studies of magnetism in single-crystal La sub 1. 94 Sr sub 0. 06 CuO sub 4

Journal Article · Tue May 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.8866· OSTI ID:6815719

Sternlieb, B J; Luke, G M; Uemura, Y J ^[1]; Riseman, T M; Brewer, J H ^[2]; Gehring, P M; Yamada, K ^[3]; Hidaka, Y; Murakami, T ^[4]; Thurston, T R; Birgeneau, R J ^[5]

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1. Physics Department, Columbia University, New York, NY (USA)
2. TRIUMF, Vancouver, 1 BC (Canada) Department of Physics, University of British Columbia, Vancouver, BC (Canada)
3. Physics Department, Brookhaven National Laboratory, Upton, NY (USA)
4. NTT Opto-electronics Laboratories, 162 Tokai, Ibaraki 319-11 (Japan)
5. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA (USA)

Combined muon-spin-relaxation ({mu}{sup +}SR) and elastic magnetic neutron-scattering experiments on a large single crystal of La{sub 1.94}Sr{sub 0.06}CuO{sub 4} are reported. {mu}{sup +}SR data taken without an external field indicate that the Cu spins are fluctuating slowly or frozen below {ital T}{sub {ital f}}{sup {mu}}{approx}6.0 K. At 3.9 K, measurements done with an applied longitudinal field show that the muon depolarization is almost completely due to static moments. Neutron measurements of the magnetic peaks {bold Q}=(1,0,0) and (0,1,1) show that no three-dimensional long-range order is present down to 1.8 K. However, the quasielastic scattering intensity from the two-dimensional ridge {bold Q}=(1,{ital k},0) at {ital k}={minus}0.12 increases sharply between 40 and 20 K. Below {ital T}{sub {ital f}}{sup {ital N}}=20 K the scattering intensity is roughly constant. The difference between these two freezing temperatures is explained in terms of the different range of fluctuation frequencies to which each of these probes is sensitive. The dependence of the freezing temperature on the frequency windows of different probes is similar to that seen in traditional spin-glass materials like {ital Cu}Mn.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6815719
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 41:13; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
MAGNETIC PROPERTIES
LANTHANUM OXIDES
ANTIFERROMAGNETISM
MUON SPIN RELAXATION
NEUTRON DIFFRACTION
PEROVSKITE
SPIN GLASS STATE
STRONTIUM ADDITIONS
STRUCTURAL CHEMICAL ANALYSIS
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
DIFFRACTION
LANTHANUM COMPOUNDS
MAGNETISM
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RELAXATION
SCATTERING
STRONTIUM ALLOYS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties