Magnetic anisotropy and spin dynamics in the kagome magnet Fe4Si2Sn7O16: NMR and magnetic susceptibility study on oriented powder
Abstract
Fe4Si2Sn7O16 hosts an undistorted kagome lattice of Fe2+ (3d6, S = 2) ions. We present results of bulk magnetization and Sn nuclear magnetic resonance (NMR) measurements on an oriented Fe4Si2Sn7O16 powder sample oriented in geometries parallel (∥) and perpendicular (⊥) to the external applied magnetic field used for orienting the powder (Bori). The bulk susceptibility χ shows a broad peak at TN ~ 3 K associated with antiferromagnetic ordering. NMR spectra indicate the presence of planar anisotropy in the kagome planes. From an analysis of the static NMR shift (K) and dynamic spin-lattice relaxation rate (1/T1) we conclude the presence of dominant magnetic fluctuations in the kagome planes. For the ∥ orientation, K scales linearly with the bulk susceptibility for temperatures down to ~ 4 K, while in the ⊥ orientation K starts to deviate strongly below T ~ 30 K. We associate this deviation with the onset of spin-tilting towards the kagome planes. These correlations are also reflected in the 1/T1 data for the ∥ orientation, which starts to decrease below T ~ 30 K. Here, in this correlated regime, TN < T < ~ 30 K, we discuss the formation of positive chiral spin correlations in the kagomemore »
- Authors:
-
- Technical Univ. of Dresden (Germany)
- Helmholtz-Zentrum Dresden-Rossendorf (Germany)
- Univ. of Auckland (New Zealand)
- Univ. of Auckland (New Zealand); The MacDiarmid Inst. for Advanced Materials and Nanotechnology, Wellington (New Zealand)
- Univ. of Sydney, NSW (Australia)
- Songshan Lake Materials Lab., Dongguang (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1771882
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 6; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Frustrated magnetism; Magnetic anisotropy; Spin dynamics; Kagome lattice; Magnetization measurements; Nuclear magnetic resonance; Susceptibility measurements
Citation Formats
Dengre, Shanu, Sarkar, R., Opherden, L., Herrmannsdörfer, T., Allison, M., Söhnel, Tilo, Ling, Chris D., Gardner, Jason S., and Klauss, H. -H. Magnetic anisotropy and spin dynamics in the kagome magnet Fe4Si2Sn7O16: NMR and magnetic susceptibility study on oriented powder. United States: N. p., 2021.
Web. doi:10.1103/physrevb.103.064425.
Dengre, Shanu, Sarkar, R., Opherden, L., Herrmannsdörfer, T., Allison, M., Söhnel, Tilo, Ling, Chris D., Gardner, Jason S., & Klauss, H. -H. Magnetic anisotropy and spin dynamics in the kagome magnet Fe4Si2Sn7O16: NMR and magnetic susceptibility study on oriented powder. United States. https://doi.org/10.1103/physrevb.103.064425
Dengre, Shanu, Sarkar, R., Opherden, L., Herrmannsdörfer, T., Allison, M., Söhnel, Tilo, Ling, Chris D., Gardner, Jason S., and Klauss, H. -H. Fri .
"Magnetic anisotropy and spin dynamics in the kagome magnet Fe4Si2Sn7O16: NMR and magnetic susceptibility study on oriented powder". United States. https://doi.org/10.1103/physrevb.103.064425. https://www.osti.gov/servlets/purl/1771882.
@article{osti_1771882,
title = {Magnetic anisotropy and spin dynamics in the kagome magnet Fe4Si2Sn7O16: NMR and magnetic susceptibility study on oriented powder},
author = {Dengre, Shanu and Sarkar, R. and Opherden, L. and Herrmannsdörfer, T. and Allison, M. and Söhnel, Tilo and Ling, Chris D. and Gardner, Jason S. and Klauss, H. -H.},
abstractNote = {Fe4Si2Sn7O16 hosts an undistorted kagome lattice of Fe2+ (3d6, S = 2) ions. We present results of bulk magnetization and Sn nuclear magnetic resonance (NMR) measurements on an oriented Fe4Si2Sn7O16 powder sample oriented in geometries parallel (∥) and perpendicular (⊥) to the external applied magnetic field used for orienting the powder (Bori). The bulk susceptibility χ shows a broad peak at TN ~ 3 K associated with antiferromagnetic ordering. NMR spectra indicate the presence of planar anisotropy in the kagome planes. From an analysis of the static NMR shift (K) and dynamic spin-lattice relaxation rate (1/T1) we conclude the presence of dominant magnetic fluctuations in the kagome planes. For the ∥ orientation, K scales linearly with the bulk susceptibility for temperatures down to ~ 4 K, while in the ⊥ orientation K starts to deviate strongly below T ~ 30 K. We associate this deviation with the onset of spin-tilting towards the kagome planes. These correlations are also reflected in the 1/T1 data for the ∥ orientation, which starts to decrease below T ~ 30 K. Here, in this correlated regime, TN < T < ~ 30 K, we discuss the formation of positive chiral spin correlations in the kagome planes.},
doi = {10.1103/physrevb.103.064425},
journal = {Physical Review B},
number = 6,
volume = 103,
place = {United States},
year = {Fri Feb 19 00:00:00 EST 2021},
month = {Fri Feb 19 00:00:00 EST 2021}
}
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