Glassy magnetic behavior in the metamagnetic DyAlO3 doped with Cr

• Published in: Journal of materials science Vol. 48; no. 20; pp. 7238 - 7244
• Main Authors: Escudero, R., Ruiz-Herrera, B. L., Jimenez, M. P., Morales, F.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.10.2013; Springer Nature B.V
• Subjects: Antiferromagnetism; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromium; Classical Mechanics; Crystallography and Scattering Methods; Curie temperature; Ferromagnetism; Magnetic measurement; Magnetic properties; Magnetism; Materials Science; Polymer Sciences; Solid Mechanics; Spin glasses; Temperature dependence; Transition temperature; Zero Field Cool; Perovskite; Spin Glass; Field Cool; Dy2O3
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-013-7540-1

Magnetic properties of DyAl 0.926 Cr 0.074 O 3 and DyAlO 3 were studied. We found that both the compounds are antiferromagnetic with a low Néel transition temperature. At higher temperatures the magnetic characteristics show a Curie–Weiss dependence. Néel temperature disappears when a field of about 2 T is applied, the system changes from an antiferromagnetic to a weak ferromagnetic behavior due to a metamagnetic transition. Furthermore, AC magnetic measurements in the Cr-doped compound, at different frequencies, show a spin glass-like behavior. These transitions were studied and corroborated by specific heat measurements. We found the presence of metamagnetism and spin glass in the compound doped with chromium, determining that the small addition of chromium atoms modifies the magnetic properties of the compound DyAlO 3 , resulting in new features such as the spin glass-like behavior.