التفاصيل البيبلوغرافية
| العنوان: |
Resolving the local distortions of Ising-like moments in magnetoelectric Ho-doped langasite |
| المؤلفون: |
Tikhanovskii, A. Yu., Ivanov, V. Yu., Kuzmenko, A. M., Stunault, A., Fabelo, O., Ressouche, E., Simonet, V., Ballou, R., Kibalin, I. A., Pimenov, A., Mukhin, A. A., Constable, E. |
| المصدر: |
Phys. Rev. B 109, 214433 (2024) |
| سنة النشر: |
2024 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Materials Science |
| الوصف: |
The magnetic properties of Ho-doped langasites (La:Ho)$_3$Ga$_5$SiO$_{14}$ are dominated by the Ising-like magnetic moments of the Ho$^{3+}$ ions. In their saturated regime, the induced magnetic state breaks both time and space inversion symmetries, leading to a novel linear magnetoelectric effect. However, due to distortions induced by a shared Ga/Si occupancy of the 2d sites, resolving the microscopic nature of the magnetic configuration remains a difficult task. Here we combine polarized neutron diffraction and angular dependent magnetization experiments to determine the local distortions of the Ho$^{3+}$ magnetic moments in doped langasites (La$_{1-x}$Ho$_x$)$_3$Ga$_5$SiO$_{14}$ with $x \approx 0.015$ and $x \approx 0.045$. We propose a model for a field-induced magnetic configuration with arbitrary orientations of the local Ising axis of Ho$^{3+}$ in distorted positions. The operations of broken local $C_2$ symmetry and rotations around the trigonal $C_3$ axis connect different sites, restoring the global P321 symmetry of the crystal and simplifying the description of the magnetic properties. The superposition of two distorted Ho$^{3+}$ positions connected by $C_2$ symmetry determines the local magnetic susceptibility tensor, which no longer appears Ising-like at low fields. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevB.109.214433 |
| URL الوصول: |
http://arxiv.org/abs/2406.18209 |
| رقم الانضمام: |
edsarx.2406.18209 |
| قاعدة البيانات: |
arXiv |