Design of a random quantum spin chain paramagnet: Sr3CuPt0.5lr0.5O6

Science

Volumn 271, Issue 5248, 1996, Pages 489-491

  Nguyen, Tu N ^a   Lee, Patrick A ^a   Zur Loye, Hans Conrad ^a  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000437085     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.271.5248.489     Document Type: Article

References (22)

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17. 3 (Cerac, 99.5%), lr metal (Aesar or Engelhard, 99.9%), Pt metal (Aesar, 99.99%), and CuO (Cerac, 99 999%) were intimately mixed with an agate mortar and pestle under acetone and pressed into pellets. The pellets were placed on platinum foil in alumina boats during heating to prevent aluminum contamination Heating the samples at 1150°C for 2 weeks with intermittent grindings yielded single-phase materials.
18. 2. The initial oxygen content was back-calculated from the measured weight loss. Heating oxygen-deficient samples in pure oxygen to 550° to 700°C resulted in a weight gain associated with the complete oxidation of the compounds
19. 2 at 550° to 750°C before use in any magnetic measurements. For data collection, all samples were cooled in zero field to 5 K. When the sample temperature reached 5 K, the magnetic field was turned on and data were collected. All data were corrected for the diamagnetic contribution of the calibrated KeI-F sample container
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21. Strictly speaking, in this compound the ferromagnetic bonds always occur in pairs rather than following a random distribution. However, the physical properties of the two models are expected to be similar.
22. Supported in part by NSF Materials Research Science and Engineering Center award DMR 94-00334 and by the MiT Science Partnership Fund.