Magnetic field dependence of nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet
Abstract
We present a comprehensive study of the magnetization dynamics and phase evolution in the chiral helimagnet Cr1/3NbS2 , which realizes a chiral soliton lattice (CSL). The magnetic field dependence of the ac magnetic response is analyzed for the first five harmonic components, Mnω (H ) (n = 1–5), using a phase sensitive measurement over a frequency range, f = 11–10 000 Hz. At a critical field, the modulated CSL continuously evolves from a helicity-rich to a ferromagnetic domain-rich structure, where the crossover is revealed by the onset of an anomalous nonlinear magnetic response that coincides with extremely slow dynamics. The behavior is indicative of the formation of a spatially coherent array of large ferromagnetic domains, which relax on macroscopic time scales. The frequency dependence of the ac magnetic loss displays an asymmetric distribution of relaxation times across the highly nonlinear CSL regime, which shift to shorter time scales with increasing temperature. We experimentally resolve the tricritical point at TTCP in a temperature regime above the ferromagnetic Curie temperature which separates the linear and nonlinear magnetic regimes of the CSL at the phase transition. A comprehensive phase diagram is constructed which summarizes the features of the field and temperature dependence ofmore »
- Authors:
-
- Univ. of South Florida, Tampa, FL (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Naval Research Lab. (NRL), Washington, DC (United States)
- Publication Date:
- Research Org.:
- Univ. of South Florida, Tampa, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1458387
- Alternate Identifier(s):
- OSTI ID: 1457814
- Grant/Contract Number:
- FG02-07ER46438
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 97; Journal Issue: 21; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Chiral helimagnet; Chiral soliton lattice; Spin dynamics; Tricritical point; Magnetic phase diagram; ac susceptibility; Dzyaloshinskii-Moriya interaction; Metamagnetic transition
Citation Formats
Clements, E. M., Das, Raja, Phan, Manh-Huong, Li, Ling, Keppens, Veerle, Mandrus, David, Osofsky, Michael, and Srikanth, Hariharan. Magnetic field dependence of nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr1/3NbS2. United States: N. p., 2018.
Web. doi:10.1103/PhysRevB.97.214438.
Clements, E. M., Das, Raja, Phan, Manh-Huong, Li, Ling, Keppens, Veerle, Mandrus, David, Osofsky, Michael, & Srikanth, Hariharan. Magnetic field dependence of nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr1/3NbS2. United States. https://doi.org/10.1103/PhysRevB.97.214438
Clements, E. M., Das, Raja, Phan, Manh-Huong, Li, Ling, Keppens, Veerle, Mandrus, David, Osofsky, Michael, and Srikanth, Hariharan. Fri .
"Magnetic field dependence of nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr1/3NbS2". United States. https://doi.org/10.1103/PhysRevB.97.214438. https://www.osti.gov/servlets/purl/1458387.
@article{osti_1458387,
title = {Magnetic field dependence of nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr1/3NbS2},
author = {Clements, E. M. and Das, Raja and Phan, Manh-Huong and Li, Ling and Keppens, Veerle and Mandrus, David and Osofsky, Michael and Srikanth, Hariharan},
abstractNote = {We present a comprehensive study of the magnetization dynamics and phase evolution in the chiral helimagnet Cr1/3NbS2 , which realizes a chiral soliton lattice (CSL). The magnetic field dependence of the ac magnetic response is analyzed for the first five harmonic components, Mnω (H ) (n = 1–5), using a phase sensitive measurement over a frequency range, f = 11–10 000 Hz. At a critical field, the modulated CSL continuously evolves from a helicity-rich to a ferromagnetic domain-rich structure, where the crossover is revealed by the onset of an anomalous nonlinear magnetic response that coincides with extremely slow dynamics. The behavior is indicative of the formation of a spatially coherent array of large ferromagnetic domains, which relax on macroscopic time scales. The frequency dependence of the ac magnetic loss displays an asymmetric distribution of relaxation times across the highly nonlinear CSL regime, which shift to shorter time scales with increasing temperature. We experimentally resolve the tricritical point at TTCP in a temperature regime above the ferromagnetic Curie temperature which separates the linear and nonlinear magnetic regimes of the CSL at the phase transition. A comprehensive phase diagram is constructed which summarizes the features of the field and temperature dependence of the magnetic crossovers and phase transitions in Cr1/3NbS2.},
doi = {10.1103/PhysRevB.97.214438},
journal = {Physical Review B},
number = 21,
volume = 97,
place = {United States},
year = {Fri Jun 29 00:00:00 EDT 2018},
month = {Fri Jun 29 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
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