Details

Autor(en) / Beteiligte

• Wu, L S
• Nikitin, S E
• Frontzek, M
• Kolesnikov, A I
• Ehlers, G
• Lumsden, M D
• Shaykhutdinov, K A
• Guo, E-J
• Savici, A T
• Gai, Z
• Sefat, A S
• Podlesnyak, A

Titel

Magnetic ground state of the Ising-like antiferromagnet DyScO3

Ist Teil von

• Physical review. B, 2017-10, Vol.96 (14)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report on the low-temperature magnetic properties of the DyScO3 perovskite, which were characterized by means of single crystal and powder neutron scattering, and by magnetization measurements. Below TN=3.15 K, Dy3+ moments form an antiferromagnetic structure with an easy axis of magnetization lying in the ab plane. The magnetic moments are inclined at an angle of ∼±28∘ to the b axis. We show that the ground-state Kramers doublet of Dy3+ is made up of primarily |±15/2〉 eigenvectors and well separated by a crystal field from the first excited state at E1=24.9 meV. This leads to an extreme Ising single-ion anisotropy, M⊥/M∥∼0.05. The transverse magnetic fluctuations, which are proportional to M⊥2/M∥2, are suppressed, and only moment fluctuations along the local Ising direction are allowed. We also found that the Dy-Dy dipolar interactions along the crystallographic c axis are two to four times larger than in-plane interactions.