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Specific heat of (formula presented) in fields up to 42 T: Clues to the hidden order

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 67, Issue: 1
2003
  • 21
    Citations
  • 0
    Usage
  • 6
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    21
    • Citation Indexes
      21
  • Captures
    6

Article Description

The large (formula presented) observed at 17.5 K in (formula presented) is inconsistent with the small, (formula presented) moment measured for the antiferromagnetism observed starting (perhaps coincidentally) at the same temperature. We report measurements of this specific-heat transition, thought to be due to some hidden order, in magnetic fields between 24 and 42 T, i.e., through the field-region where three metamagnetic transitions are known to occur at 35.8, 37.3, and 39.4 T. The response of (formula presented) in single crystal (formula presented) to magnetic field, which includes a change to (formula presented) being possibly associated with a first-order phase transition for high fields, is analyzed to shed further light on the possible explanations of this unknown ordering process. At fields above 35 T, a new high-field phase comes into being; the connection between this high-field phase revealed by the specific heat and earlier magnetization data is discussed. © 2003 The American Physical Society.

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