Tunable reversals of magnetization and exchange bias of perovskite YbCr1-Fe O3 (x = 0–0.15)

Giant exchange bias field above room temperature in perovskite YbCr1−xFexO3 (x = 0.6–0.9)

“…26 In melt-spun Mn 55 Bi 45 alloys, the spontaneous EB is also ascribed to local AFM clusters formed in ferromagnets at 300-550 K. 27 In our previously reported YbCr 1Àx-Fe x O 3 (x = 0-0.15) systems, the EB was also found, but the temperature range was below room temperature. 28 In this paper, it is found that the T N continues to increase with the increase of the Fe 3+ ion concentration, and the temperature range at which EB occurs rises above room temperature, which will be more conducive to the practical applications of the EB effect. For the intrinsic EB mechanism, this paper proposes that the EB is due to the FM coupling between the canting AFM coupling Fe 3+ /Cr 3+ ions and Yb 3+ .…”

“…Assuming the simplest case, where the magnetic lattice of the sample consists of Yb 3+ and Fe/Cr 3+ ions, the Yb 3+ ions are A-site, and Fe 3+ /Cr 3+ ions are randomly B-site. The unit coupling energy between the weak FM component generated by Fe 3+ /Cr 3+ ions and the Yb 3+ can be expressed as: 28,48,49…”

“…26 In melt-spun Mn 55 Bi 45 alloys, the spontaneous EB is also ascribed to local AFM clusters formed in ferromagnets at 300–550 K. 27 In our previously reported YbCr 1− x Fe x O 3 ( x = 0–0.15) systems, the EB was also found, but the temperature range was below room temperature. 28…”

Negative zero‐field‐cooled magnetization and magnetic switching in multiferroic Lu0.5Sc0.5FeO3 ceramics

“…26 In recent years, researchers have found that perovskite RMO 3 (R: rare-earth element, M: transition-metal element) oxides are good material systems for studying negative magnetization. [27][28][29][30][31][32][33][34] For R within nonmagnetic state in perovskite RMO 3 oxides with only one magnetic sublattice, such as YVO 3 , 28 YFe 0.5 Cr 0.5 O 3 , 30 and BiFe 0.5 Mn 0.5 O 3 , 31 the origin of the negative magnetization may be from the competition of magnetocrystalline anisotropy and the Dzyaloshinsky-Moriya (D-M) interaction or other possible explanations.…”

“…For R within magnetic state in perovskite RMO 3 oxides with two magnetic sublattices, such as YbCrO 3 , 29 ErFe 0.55 Mn 0.45 O 3 , 32 and LuCr 1-x Mn x O 3 , 33 the negative magnetization is attributed to the antiferromagnetic coupling between the transition-metal and rare-earth moments. As such an important magnetic phenomenon, relevant review articles have systematically described the mechanism of negative magnetization.…”