Magnetic Properties of Perovskite GdCrO3

✍ Scribed by K. Yoshii

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 300 KB
• Volume: 159
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.9152

✦ Synopsis

The gadolinium orthochromate GdCrO 3 exhibits negative magnetization when magnetization+temperature curves are measured in a 5eld-cooled mode with low applied 5elds (<&500 Oe). This compound shows canted-antiferromagnetic order of Cr 3؉ moments with a Neel temperature (T N ) of &170 K. With cooling the samples below T N , magnetization exhibits peak values (M MAX ) with a positive sign at &160 K. Below this temperature, it decreases with decreasing temperature, passes through a zero value (M ‫؍‬ 0) at T 1 <&130 K, and continues to decrease until T MIN (>&25 K). This behavior is interpreted in connection with the paramagnetic Gd 3؉ moments whose direction is opposite to that of canted Cr 3؉ moments. The maximum absolute value of the negative magnetization was much larger than M MAX , i.e., nearly 30 times as large as M MAX with an applied 5eld of 100 Oe. With further cooling, the magnetization increase and cross again M ‫؍‬ 0 around T 2 (>&10 K).