CALORIMETRIC INVESTIGATION OF THE ANTIFERROMAGNETIC TRANSITION IN NiCl2. 6H2O

Abstract

The results of measurements of the specific heat of nickel chloride hexahydrate in zero and various applied fields are presented. The specific heats of two single-crystal samples were determined in zero field between 4.3 and 5.8 K with temperature resolution of 10 to the -6th K. The functional form of the specific heat near the Neel temperature was determined and compared with theoretical predictions. The specific heat maximum of both crystals is found to be rounded over several millidegrees. The effect of magnetic fields applied along the easy axis on the specific heat peak was investigated. The peak was found to be slightly broadened by the field, and occurred at lower temperatures. The boundary between antiferromagnetic and paramagnetic phases was determined for fields to 20 kilo-oersteds.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1969
Accession Number
AD0704072

Entities

People

  • William L. Johnson

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Critical Temperature
  • Crystal Structure
  • Electronic Circuits
  • Electronic Equipment
  • Energy
  • Heat Capacity
  • Heat Energy
  • Magnetic Fields
  • Magnetic Properties
  • Mean Field Theory
  • Measurement
  • Neel Temperature
  • Phase Transformations
  • Pressure Measurement
  • Single Crystals
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology
  • Surface Engineering/Surface Coating Technology.