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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 · · Physical Review, B: Condensed Matter; (USA)
; ;  [1]; ;  [2]; ;  [3]; ;  [4]; ;  [5]
  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)
+ Show Author Affiliations
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), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:13; ISSN 0163-1829; ISSN PRBMD
Country of Publication:
United States
Language:
English

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Related Subjects

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