Quasi-One-Dimensional Linarite-Type PbCu(SeO4)(OH)2 with Competing Nearest-Neighbor and Next-Nearest-Neighbor Intrachain Exchange Interactions

Maria Markina; Konstantin Zakharov; Yevgeniy Ovchenkov; Grigoriy Pashkov; Konstantin Lyssenko; Petr Berdonosov; Zlata Pchelkina; Alexander Vasiliev

doi:10.3390/ma15217860

Quasi-One-Dimensional Linarite-Type PbCu(SeO₄)(OH)₂ with Competing Nearest-Neighbor and Next-Nearest-Neighbor Intrachain Exchange Interactions

Materials (Basel). 2022 Nov 7;15(21):7860. doi: 10.3390/ma15217860.

Authors

Maria Markina^{1

2}, Konstantin Zakharov¹, Yevgeniy Ovchenkov¹, Grigoriy Pashkov¹, Konstantin Lyssenko¹, Petr Berdonosov^{1

2}, Zlata Pchelkina^{3

4}, Alexander Vasiliev^{1

2}

Affiliations

¹ Lomonosov Moscow State University, Moscow 119991, Russia.
² National University of Science and Technology "MISiS", Moscow 119049, Russia.
³ Ural Federal University, Ekaterinburg 620002, Russia.
⁴ Institute of Metal Physics, RAS, Ekaterinburg 620108, Russia.

Abstract

PbCu(SeO₄)(OH)₂, the selenate sibling of the mineral linarite, was synthesized hydrothermally, investigated in measurements of magnetization M, specific heat C_p and dielectric permittivity ε, and analyzed within density functional theory formalism. This quasi-one-dimensional compound evidences formation of a short-range correlation regime at T* ~ 8 K and experiences a long-range magnetic order at T_N = 4.3 K. A magnetization saturation of approximately 1 µ_B is reached at µ₀H_flip ~ 16 T preceded by a jump at µ₀H_flop = 2.4 T. Additionally, there are multiple indicators of the formation of an additional electrically active phase above the Neel temperature, which suggests that PbCu(SeO₄)(OH)₂ is a multiferroic system.

Keywords: linarite; low-dimensional magnetism; magnetic phase diagram.

Grants and funding

The Megagrant program of the Government of Russian Federation through the project 075-15-2021-604. The Russian Science Foundation through the project 22-22-00023. The Russian Foundation for Basic Research through the project 20-02-00015.