THERMAL CONDUCTIVITY MEASUREMENTS OF EUO ACROSS THE CURIE POINT.
Abstract
The investigation represents the first measurements of the thermal conductivity K of the magnetic semiconductor EuO. The measurements were carried out through the Curie point in the temperature range 55-300K. The sample used was a hot-pressed powder 90% EuO and 10% Eu2O3 2.9 mm diameter and 19 mm long. Values of K ranged from 14 mW/cm-deg at 260K to 24 mW/cm-deg at 96K to 22 mW/cm-deg at 64K with a sharp dip by a factor of four in the thermal conductivity near 69K. The results indicate the thermal conductivity is strongly affected by the ferromagnetic-paramagnetic transition, reported from specific heat measurements to be 69.3K. The results of the electrical resistivity of EuO gave values of about 3.5(10)9 ohm-cm at 61.5K and 1.4(10)9 ohm-cm at 297.2K. The resistivity decreases with increasing temperature as expected for a semiconductor. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0659181
Entities
People
- John Ligon Cason Jr
Organizations
- South Dakota School of Mines and Technology