Magnetic order, hysteresis, and phase coexistence in magnetoelectric
Abstract
Here, the magnetic phase diagram of magnetoelectric LiCoPO4 is established using neutron diffraction and magnetometry in fields up to 25.9T applied along the crystallographic b axis. For fields greater than 11.9T, the magnetic unit cell triples in size with propagation vector Q = (0,1/3,0). A magnetized elliptic cycloid is formed with spins in the (b,c) plane and the major axis oriented along b. Such a structure allows for the magnetoelectric effect with an electric polarization along c induced by magnetic fields applied along b. Intriguingly, additional ordering vectors Q ≈ (0,1/4,0) and Q ≈ (0,1/2,0) appear for increasing fields in the hysteresis region below the transition field. Traces of this behavior are also observed in the magnetization. A simple model based on a mean-field approach is proposed to explain these additional ordering vectors. In the field interval 20.5–21.0T, the propagation vector Q = (0,1/3,0) remains but the spins orient differently compared to the cycloid phase. Furthermore, above 21.0T and up until saturation, a commensurate magnetic structure exists with a ferromagnetic component along b and an antiferromagnetic component along
- Authors:
-
- Technical Univ. of Denmark, Lyngby (Denmark)
- CEA & Univ. Grenoble Alpes, Grenoble (France)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland); Univ. of Copenhagen, Copenhagen (Denmark)
- Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1396276
- Alternate Identifier(s):
- OSTI ID: 1390650
- Report Number(s):
- IS-J-9457
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1702845
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 10; 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
Fogh, Ellen, Toft-Petersen, Rasmus, Ressouche, Eric, Niedermayer, Christof, Holm, Sonja Lindahl, Bartkowiak, Maciej, Prokhnenko, Oleksandr, Sloth, Steffen, Isaksen, Frederik Werner, Vaknin, David, and Christensen, Niels Bech. Magnetic order, hysteresis, and phase coexistence in magnetoelectric LiCoPO4. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.96.104420.
Fogh, Ellen, Toft-Petersen, Rasmus, Ressouche, Eric, Niedermayer, Christof, Holm, Sonja Lindahl, Bartkowiak, Maciej, Prokhnenko, Oleksandr, Sloth, Steffen, Isaksen, Frederik Werner, Vaknin, David, & Christensen, Niels Bech. Magnetic order, hysteresis, and phase coexistence in magnetoelectric LiCoPO4. United States. https://doi.org/10.1103/PhysRevB.96.104420
Fogh, Ellen, Toft-Petersen, Rasmus, Ressouche, Eric, Niedermayer, Christof, Holm, Sonja Lindahl, Bartkowiak, Maciej, Prokhnenko, Oleksandr, Sloth, Steffen, Isaksen, Frederik Werner, Vaknin, David, and Christensen, Niels Bech. Fri .
"Magnetic order, hysteresis, and phase coexistence in magnetoelectric LiCoPO4". United States. https://doi.org/10.1103/PhysRevB.96.104420. https://www.osti.gov/servlets/purl/1396276.
@article{osti_1396276,
title = {Magnetic order, hysteresis, and phase coexistence in magnetoelectric LiCoPO4},
author = {Fogh, Ellen and Toft-Petersen, Rasmus and Ressouche, Eric and Niedermayer, Christof and Holm, Sonja Lindahl and Bartkowiak, Maciej and Prokhnenko, Oleksandr and Sloth, Steffen and Isaksen, Frederik Werner and Vaknin, David and Christensen, Niels Bech},
abstractNote = {Here, the magnetic phase diagram of magnetoelectric LiCoPO4 is established using neutron diffraction and magnetometry in fields up to 25.9T applied along the crystallographic b axis. For fields greater than 11.9T, the magnetic unit cell triples in size with propagation vector Q = (0,1/3,0). A magnetized elliptic cycloid is formed with spins in the (b,c) plane and the major axis oriented along b. Such a structure allows for the magnetoelectric effect with an electric polarization along c induced by magnetic fields applied along b. Intriguingly, additional ordering vectors Q ≈ (0,1/4,0) and Q ≈ (0,1/2,0) appear for increasing fields in the hysteresis region below the transition field. Traces of this behavior are also observed in the magnetization. A simple model based on a mean-field approach is proposed to explain these additional ordering vectors. In the field interval 20.5–21.0T, the propagation vector Q = (0,1/3,0) remains but the spins orient differently compared to the cycloid phase. Furthermore, above 21.0T and up until saturation, a commensurate magnetic structure exists with a ferromagnetic component along b and an antiferromagnetic component along},
doi = {10.1103/PhysRevB.96.104420},
journal = {Physical Review B},
number = 10,
volume = 96,
place = {United States},
year = {2017},
month = {9}
}
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