Abstract
The magnetic phase diagram of demonstrates complex magnetic transitions for with two long-range magnetic-order transitions at and . A glasslike feature emerges between and with the application of a direct current (dc) magnetic field in alternating current (ac) susceptibility measurements. Dielectric measurements show a change from the conventional dielectric to a quantum-paraelectric-like behavior without anomalies near the magnetic ordering temperature in the range . The strong correlation among magnetic, dielectric, and ferroelectric properties near the structural relaxation temperatures 41 and 17 K confirms the emergence of multiferroic behavior in . A significant x-ray magnetic circular dichroism signal at the Ni site and ac susceptibility measurements indicate a spin-canting behavior between and . The dilute doping of the non-Jahn-Teller Zn ion in the Jahn-Teller Ni site modulate the different magnetic exchange interactions of Ni and Cr, which could invoke spin-canting and multiferroic behaviors.
3 More- Received 22 July 2016
- Revised 22 October 2016
DOI:https://doi.org/10.1103/PhysRevB.94.205143
©2016 American Physical Society