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Title: 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:
 [1];  [1];  [2];  [2];  [3];  [4];  [5];  [6];  [1];  [7];  [3]
  1. Helmholtz Zentrum Berlin Fur Materialien und Energie, Berlin (Germany)
  2. Technical Univ. of Denmark, Lyngby (Denmark)
  3. Iowa State Univ., Ames, IA (United States)
  4. Helmholtz Zentrum Berlin Fur Materialien und Energie, Berlin (Germany); Institute for Basic Science (IBS), Seoul (Korea)
  5. Technical Univ. of Denmark, Lyngby (Denmark); Paul Scherrer Institut, Villigen (Switzerland); Univ. of Birmingham, Birmingham (United Kingdom)
  6. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  7. 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}
}

Journal Article:

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Cited by: 37 works
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Works referencing / citing this record:

Mössbauer Spectroscopy of Triphylite (LiFePO4) at Low Temperatures
journal, October 2019

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