Lamellar Crystal Structure and Haldane Magnetism in NH4VPO4OH

Author:

Samarin Aleksandr Sh.1,Trussov Ivan A.1,Pchelkina Zlata V.23,Fedotov Stanislav S.1,Ovchenkov Yevgeniy A.45,Zhurenko Sergei V.6,Tkachev Alexei V.6,Gippius Andrei A.5,Shvanskaya Larisa V.45,Vasiliev Alexander N.45ORCID

Affiliation:

1. Skolkovo Institute of Science and Technology Bolshoi Boulevard 30 bld. 1 Moscow 121205 Russia

2. M.N. Mikheev Institute of Metal Physics, UB RAS S. Kovalevskaya street 18 Ekaterinburg 620990 Russia

3. Theoretical Physics and Applied Mathematics Department Ural Federal University Mira street 19 Ekaterinburg 620002 Russia

4. National University of Science and Technology “MISiS” Leninskiy Prospekt 4 Moscow 119049 Russia

5. Lomonosov Moscow State University Leninskie Gory, GSP-1 Moscow 119991 Russia

6. Lebedev Physical Institute RAS Leninskiy Prospekt 53 Moscow 119991 Russia

Abstract

AbstractA novel vanadium hydroxide‐phosphate, NH4VPO4OH, was synthesized hydrothermally in V2O5−NH4H2PO4‐citric acid system at 230 °C. It was characterized by XRD, TG‐DSC, SEM‐EDX, FTIR and NMR spectroscopy. NH4VPO4OH is isostructural with NH4GaPO4OH and features edge‐sharing chains of VO6 octahedra. These chains running along [010] direction of the unit cell are connected by phosphate tetrahedra to form infinite layers parallel to the (100) plane. Ammonium cations are embedded between the heteropolyhedral layers. According to the thermodynamic and NMR measurements supported by the first‐principles calculations, NH4VPO4OH presents a rare case of Haldane spin system with spin S=1 based on V3+ ions.

Funder

Megagrants

Russian Science Foundation

Ministry of Science and Higher Education of the Russian Federation

Publisher

Wiley

Subject

General Medicine

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