Negative exchange bias in single-phase Dy1xNdxCrO3 induced by Nd doping

A. McDannald, C. R. dela Cruz, M. S. Seehra, and M. Jain
Phys. Rev. B 93, 184430 – Published 25 May 2016

Abstract

Observation of significant negative exchange bias (HE) is reported in solid solutions of single-phase samples of Dy1xNdxCrO3 for x=0.33,0.67, and 1 with corresponding Néel temperatures at TNCr=175K,200K, and 225 K, respectively, and the spin-reorientation transitions TSR at 48 K, 58 K, and 38 K, respectively. In contrast, no HE was observed for the sample with x=0 (i.e., DyCrO3) shows no HE below its TNCr=145K, and no reorientation of spins at lower temperatures was observed. More importantly, the (negative) HE for the x=0.33,0.67, and 1 samples is observed only in the temperature range between TN and TSR with the corresponding observation of magnetic coercivity. These results show that the canted antiferromagnetic Γ7,Cr structure of the Cr3+ moments present between TNCr and TSR is essential for the observed HE. By comparing this result to the literature, common features of single-phase materials with HE were identified. The present bulk powder samples were prepared by the citrate method and structurally characterized by x-ray diffraction and Raman spectroscopy techniques. Neutron diffraction measurements for the x=0.33,0.67, and 1 samples at select temperatures were done to verify the presence of the Γ7,Cr structure between TNCr and TSR and the Γ1,Cr structure (with no canting of Cr3+ moments) below TSR.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
3 More
  • Received 2 February 2016
  • Revised 11 May 2016

DOI:https://doi.org/10.1103/PhysRevB.93.184430

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. McDannald1, C. R. dela Cruz2, M. S. Seehra3, and M. Jain4,5

  • 1Materials Science and Engineering Department, University of Connecticut, Storrs, Connecticut 06269, USA
  • 2Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, USA
  • 4Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
  • 5Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 18 — 1 May 2016

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×