Weak ferromagnetism in the magnetoelectric detected by microwave power absorption measurements

✍ Scribed by G. Alvarez; M.P. Cruz; A.C. Durán; H. Montiel; R. Zamorano

• Book ID: 104093911
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 472 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.06.047

✦ Synopsis

An electron paramagnetic resonance (EPR) study in polycrystalline magnetoelectric YCrO 3 is carried out at the X-band (8.8-9.8 GHz) in the 85-300 K temperature range. For all the temperatures, the EPR spectra show a single broad line attributable to Cr 3+ (S = 3/2) ions. The onset of the antiferro-paramagnetic transition has been determined from the temperature dependence of parameters deduced from the EPR spectra: the integrated intensity (I EPR ), the g-factor and the peak-to-peak linewidth (∆H pp ). Below 140 K, a weak ferromagnetism is observed and it is attributed to canting of Cr 3+ ion sublattices in the antiferromagnetic matrix. Low-field microwave absorption (LFMA) is used to give further knowledge on this material; where this technique also gives evidence of the magnetic order, suggesting a weak ferromagnetism at low temperature.