Magnetostriction of Rare Earth-Iron Compounds RFe3 and R6Fe23,
Abstract
Previous work on the cubic Laves phase rare earth-Fe2 compounds has shown that these materials possess enormous magnetostriction constants. In some of these compounds this huge strain is even present at room temperature. Both TbFe2 and SmFe2 possess a room temperature magnetostriction true value of Lambda > 2000 ppm. Although the magnetostriction of the RFe2 compounds (R = Sm, Tb, Dy, Ho, Er and Tm) has been extensively studied, little attention has been paid to the magnetostriction of the remaining rare earth-iron intermetallic compounds. Here we report measurements of the magnetostriction of the RFe3 and R6Fe23 compounds from room temperature to 80K. The room temperature magnetostrictions of the R2Fe17 compounds were also investigated. In the rare earth-iron series the Curie temperatures are the highest for the RFe2 compounds (560-710K) and decrease with increasing iron concentration. Just the opposite is true for the rare earth-cobalt and rare earth-nickel series. Mossbauer effect measurements have been reported on the RFe3 series at various temperatures. These results indicate the direction of the magnetization in these compounds. An attempt will be made to correlate the direction of the magnetization with the behavior of the magnetostriction as a function of temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1980
- Accession Number
- ADA086400
Entities
People
- A. E. Clark
- R. Abbundi
Organizations
- Naval Ordnance Laboratory