Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4
Abstract
We report significant details of the magnetic structure and spin dynamics of LiFePO4 obtained by single-crystal neutron scattering. Our results confirm a previously reported collinear rotation of the spins away from the principal b axis, and they determine that the rotation is toward the a axis. In addition, we find a significant spin-canting component along c. Furthermore, the possible causes of these components are discussed, and their significance for the magnetoelectric effect is analyzed. Inelastic neutron scattering along the three principal directions reveals a highly anisotropic hard plane consistent with earlier susceptibility measurements. While using a spin Hamiltonian, we show that the spin dimensionality is intermediate between XY- and Ising-like, with an easy b axis and a hard c axis. As a result, it is shown that both next-nearest neighbor exchange couplings in the bc plane are in competition with the strongest nearest neighbor coupling.
- Authors:
-
- Helmholtz Zentrum Berlin Fur Materialien und Energie, Berlin (Germany)
- Technical Univ. of Denmark, Lyngby (Denmark)
- Iowa State Univ., Ames, IA (United States)
- Helmholtz Zentrum Berlin Fur Materialien und Energie, Berlin (Germany); Institute for Basic Science (IBS), Seoul (Korea)
- Technical Univ. of Denmark, Lyngby (Denmark); Paul Scherrer Institut, Villigen (Switzerland); Univ. of Birmingham, Birmingham (United Kingdom)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Univ. of Copenhagen (Denmark)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1227391
- Alternate Identifier(s):
- OSTI ID: 1198669
- Report Number(s):
- IS-J-8744
Journal ID: ISSN 1098-0121; PRBMDO
- Grant/Contract Number:
- DANSCATT; PP002-102831; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Toft-Petersen, Rasmus, Reehuis, Manfred, Jensen, Thomas B. S., Andersen, Niels H., Li, Jiying, Le, Manh Duc, Laver, Mark, Niedermayer, Christof, Klemke, Bastian, Lefmann, Kim, and Vaknin, David. Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.92.024404.
Toft-Petersen, Rasmus, Reehuis, Manfred, Jensen, Thomas B. S., Andersen, Niels H., Li, Jiying, Le, Manh Duc, Laver, Mark, Niedermayer, Christof, Klemke, Bastian, Lefmann, Kim, & Vaknin, David. Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4. United States. https://doi.org/10.1103/PhysRevB.92.024404
Toft-Petersen, Rasmus, Reehuis, Manfred, Jensen, Thomas B. S., Andersen, Niels H., Li, Jiying, Le, Manh Duc, Laver, Mark, Niedermayer, Christof, Klemke, Bastian, Lefmann, Kim, and Vaknin, David. Mon .
"Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4". United States. https://doi.org/10.1103/PhysRevB.92.024404. https://www.osti.gov/servlets/purl/1227391.
@article{osti_1227391,
title = {Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4},
author = {Toft-Petersen, Rasmus and Reehuis, Manfred and Jensen, Thomas B. S. and Andersen, Niels H. and Li, Jiying and Le, Manh Duc and Laver, Mark and Niedermayer, Christof and Klemke, Bastian and Lefmann, Kim and Vaknin, David},
abstractNote = {We report significant details of the magnetic structure and spin dynamics of LiFePO4 obtained by single-crystal neutron scattering. Our results confirm a previously reported collinear rotation of the spins away from the principal b axis, and they determine that the rotation is toward the a axis. In addition, we find a significant spin-canting component along c. Furthermore, the possible causes of these components are discussed, and their significance for the magnetoelectric effect is analyzed. Inelastic neutron scattering along the three principal directions reveals a highly anisotropic hard plane consistent with earlier susceptibility measurements. While using a spin Hamiltonian, we show that the spin dimensionality is intermediate between XY- and Ising-like, with an easy b axis and a hard c axis. As a result, it is shown that both next-nearest neighbor exchange couplings in the bc plane are in competition with the strongest nearest neighbor coupling.},
doi = {10.1103/PhysRevB.92.024404},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 92,
place = {United States},
year = {Mon Jul 06 00:00:00 EDT 2015},
month = {Mon Jul 06 00:00:00 EDT 2015}
}
Web of Science
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