ULTRASONIC MEASUREMENTS IN MnF2 NEAR THE NEEL TEMPERATURE,
Abstract
The ultrasonic velocity has been measured for both longitudinal and transverse waves in the (110) and (001) directions in MnF2 near the critical point. A sharp minimum was observed for longitudinal waves. This minimum coincided with an attenuation maximum and occurred at the Neel temperature. The velocity anomaly was frequency independent for the two frequencies used. No effect was observed for transverse waves. The attenuation was measured over a wide temperature range. The temperature dependence of both critical attenuation and velocity is given by (T-T sub N) to -0.33 power for T greater than T sub N, where T sub N is the Neel temperature of 67.34K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1969
- Accession Number
- AD0695494
Entities
People
- R. G. Leisure
- R. W. Moss
Organizations
- Boeing