Journal article · Preprint article
Field-induced magnetic phases and electric polarization in LiNiPO4
Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Neutron diffraction is used to probe the (H,T) phase diagram of magnetoelectric (ME) LiNiPO4 for magnetic fields along the c axis. At zero field the Ni spins order in two antiferromagnetic phases. One has commensurate (C) structures and general ordering vectors k(C)=(0,0,0); the other one is incommensurate (IC) with k(IC)=(0,q,0).
At low temperatures the C order collapses above mu H-0=12 T and adopts an IC structure with modulation vector parallel to k(IC). We show that C order is required for the ME effect and establish how electric polarization results from a field-induced reduction in the total magnetoelastic energy.
Language: | English |
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Year: | 2009 |
Pages: | 5 |
ISSN: | 1550235x , 10980121 and 01631829 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevB.79.092412 |
ORCIDs: | 0000-0003-4282-756X and Christensen, Niels Bech |
Materialeforskning Materialekarakterisering og materialemodellering Materials characterization and modelling Materials research antiferromagnetism lithium compounds magnetic structure magnetic transitions magnetoelastic effects magnetoelectric effects neutron diffraction nickel compounds