Thermal Expansion of Alkaline-Doped Lanthanum Ferrite Near the Néel Temperature

Authors

Geoffrey L. Beausoleil II, Boise State UniversityFollow
Patrick Price, Boise State University
David Thomsen, Boise State University
Alex Punnoose, Boise State UniversityFollow
Rick Ubic, Boise State UniversityFollow
Darryl P. Butt, Boise State UniversityFollow
Scott Misture, Alfred University

Document Type

Article

Publication Date

1-2014

Abstract

The thermal expansion and magnetic behaviors of divalent, alkaline-doped lanthanum ferrites (La_0.9M_0.1FeO₃, M=Ca, Sr, Ba) were assessed using a combination of dilatometry, magnetometry, time-of-flight neutron diffraction, and high-temperature X-ray diffraction. Néel temperatures were determined through vibrating sample magnetometry and correlated well with changes in thermal expansion behavior observed during both dilatometry and X-ray diffraction. The Néel temperatures observed for pure, Ca-doped, Sr-doped, and Ba-doped lanthanum ferrites were 471°C, 351°C, 465°C, and 466°C, respectively. The effect of divalent substitutions on the magnetic behavior are attributed to charge compensation mechanisms and structural changes in the material.

Publication Information

Beausoleil, Geoffrey L. II; Price, Patrick; Thomsen, David; Punnoose, Alex; Ubic, Rick; Butt, Darryl P.; and Misture, Scott. (2014). "Thermal Expansion of Alkaline-Doped Lanthanum Ferrite Near the Néel Temperature". Journal of the American Ceramic Society, 97(1), 228-234. https://doi.org/10.1111/jace.12625