YRuO3: A quantum weak ferromagnet

Kunlang Ji, Arpita Paul, Elena Solana-madruga, Angel M. Arevalo-lopez, Umesh V. Waghmare, J. Paul Attfield

Research output: Contribution to journalArticlepeer-review

Abstract

The perovskite YRuO3 containing low-spin d5 Ru3+ has a Pnma orthorhombic structure with elongated RuO6octahedra evidencing orbital order and is insulating to low temperatures with a band gap of 70 meV. Canted antiferromagnetic Ru3+ spin order is observed below TC = 97 K, and magnetization plateaus that emerge below 62 K reveal a quantum weak ferromagnetic state where 1/8 of the spins are reversed, reflecting extreme singleion anisotropy resulting from the strong spin-orbit coupling of the d5 Ru3+ ion. Dynamic effects of the reversed spins give rise to an unusual negative AC susceptibility response, and a partial freezing of this motion occurs at
27 K.
Original languageEnglish
JournalPhysical Review Materials
Volume4
Issue number9
Early online date21 Sep 2020
DOIs
Publication statusE-pub ahead of print - 21 Sep 2020

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