Compensation effect and magnetostriction in CoCr2−xFexO4. Issue 7 (9th November 2012)

• Record Type: Journal Article
• Authors: Zhang, Hong‐guo; Wang, Weng‐hong; Liu, En‐ke; Tang, Xiao‐dan; Li, Gui‐jiang; Zhang, Hong‐wei; Wu, Guang‐heng
• Is Part Of: Physica status solidi. Volume 250:Issue 7(2013:Jul.)
• Page Start: 1287
• Page End: 1292
• Publication Date: 2012-11-09
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201248470
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The magnetic compensation and magnetostriction properties in Fe‐doped CoCr₂O₄ samples have been investigated. Structural and magnetic measurements imply that the doped Fe³⁺ ions initially occupy the B1 (Cr) sites when <italic>x</italic> &lt; 0.1, and then mainly take the A (Co) sites. This behaviour results in a role conversion of magnetic contributors and a composition compensation between two competitively magnetic sublattices at <italic>x</italic> = 0.1. Temperature‐dependent compensation has also been found in the samples with <italic>x</italic> = 0.1–0.22, with the compensation temperature in the range of 40–104 K. The Fe³⁺ doping also modulates the exchange interaction of the system and prevents the formation of long‐range conical order of spins. The magnetoelectric transition temperature at 23 K in CoCr₂O₄ is shifted to lower temperature by increasing the dopants. The magnetostriction effect in this system has been observed for the first time. The strain has a maximum value of about 280 ppm at <italic>x</italic> = 0.4. The magnetostriction is consistent with the behaviour of the two magnetic compensations.</p> </abstract>