Field-Induced Magnetic States in the Metallic Rare-Earth Layered Triangular Antiferromagnet TbAuAl4Ge2
Abstract
Magnetic frustration in metallic rare- earth lanthanides (Ln) with 4f electrons is crucial for producing interesting magnetic phases with high magnetic anisotropy where intertwined charge and spin degrees of freedom lead to novel phenomena. Here we report on the magnetic, thermodynamic, and electrical transport properties of TbAuAl4Ge2. Tb ions form two-dimensional triangular lattice layers which stack along the crystalline c axis. The magnetic phase diagram reveals multiple nearly degenerate ordered states upon applying field along the magnetically easy ab-plane before saturation. The magnetoresistance in this configuration exhibits intricate field dependence that closely follows that of the magnetization while the specific heat reveals a region of highly enhanced entropy, suggesting the possibility of a nontrivial spin textured phase. For fields applied along the c axis (hard axis), we find linear magnetoresistance over a wide range of fields. Further, we compare the magnetic properties and magnetoresistance with an isostructural GdAuAl4Ge2 single crystal. These results identify TbAuAl4Ge2 as an environment for complex quantum spin states and pave the way for further investigations of the broader LnAuAl4Ge2 family of materials.
- Authors:
-
[1]
- Univ. of Colorado, Boulder, CO (United States)
- Florida State Univ., Tallahassee, FL (United States)
- Cornell Univ., Ithaca, NY (United States)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- OSTI Identifier:
- 1905255
- Grant/Contract Number:
- SC0021377; DMR-1904361; DMR-1644779
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 106; Journal Issue: 9; 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
Citation Formats
Leahy, Ian A., Feng, Keke, Dery, Roei, Baumbach, Ryan, and Lee, Minhyea. Field-Induced Magnetic States in the Metallic Rare-Earth Layered Triangular Antiferromagnet TbAuAl4Ge2. United States: N. p., 2022.
Web. doi:10.1103/physrevb.106.094426.
Leahy, Ian A., Feng, Keke, Dery, Roei, Baumbach, Ryan, & Lee, Minhyea. Field-Induced Magnetic States in the Metallic Rare-Earth Layered Triangular Antiferromagnet TbAuAl4Ge2. United States. https://doi.org/10.1103/physrevb.106.094426
Leahy, Ian A., Feng, Keke, Dery, Roei, Baumbach, Ryan, and Lee, Minhyea. Thu .
"Field-Induced Magnetic States in the Metallic Rare-Earth Layered Triangular Antiferromagnet TbAuAl4Ge2". United States. https://doi.org/10.1103/physrevb.106.094426. https://www.osti.gov/servlets/purl/1905255.
@article{osti_1905255,
title = {Field-Induced Magnetic States in the Metallic Rare-Earth Layered Triangular Antiferromagnet TbAuAl4Ge2},
author = {Leahy, Ian A. and Feng, Keke and Dery, Roei and Baumbach, Ryan and Lee, Minhyea},
abstractNote = {Magnetic frustration in metallic rare- earth lanthanides (Ln) with 4f electrons is crucial for producing interesting magnetic phases with high magnetic anisotropy where intertwined charge and spin degrees of freedom lead to novel phenomena. Here we report on the magnetic, thermodynamic, and electrical transport properties of TbAuAl4Ge2. Tb ions form two-dimensional triangular lattice layers which stack along the crystalline c axis. The magnetic phase diagram reveals multiple nearly degenerate ordered states upon applying field along the magnetically easy ab-plane before saturation. The magnetoresistance in this configuration exhibits intricate field dependence that closely follows that of the magnetization while the specific heat reveals a region of highly enhanced entropy, suggesting the possibility of a nontrivial spin textured phase. For fields applied along the c axis (hard axis), we find linear magnetoresistance over a wide range of fields. Further, we compare the magnetic properties and magnetoresistance with an isostructural GdAuAl4Ge2 single crystal. These results identify TbAuAl4Ge2 as an environment for complex quantum spin states and pave the way for further investigations of the broader LnAuAl4Ge2 family of materials.},
doi = {10.1103/physrevb.106.094426},
journal = {Physical Review. B},
number = 9,
volume = 106,
place = {United States},
year = {Thu Sep 22 00:00:00 EDT 2022},
month = {Thu Sep 22 00:00:00 EDT 2022}
}
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