Article (Scientific journals)
Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonates A3Ni2SbO6 (A=Li, Na)
Zvereva, E.A.; Stratan, M.I.; Ovchenkov, Y.A. et al.
2015In Physical Review. B, Condensed Matter and Materials Physics, 92, p. 144401
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Keywords :
Magnetic phase boundaries; Crystal-field theory and spin Hamiltonians; Magnetic anisotropy
Abstract :
[en] We present a comprehensive experimental and theoretical study of the electronic and magnetic properties of two quasi-two-dimensional (2D) honeycomb-lattice monoclinic compounds A3Ni2SbO6 (A=Li, Na). Magnetic susceptibility and specific heat data are consistent with the onset of antiferromagnetic (AFM) long range order at low temperatures with Néel temperatures ~ 14 and 16 K for Li3Ni2SbO6 and Na3Ni2SbO6, respectively. The effective magnetic moments of 4.3 Bohr magnetons/f.u. (Li3Ni2SbO6) and 4.4 Bohr magnetons/f.u. (Na3Ni2SbO6) indicate that Ni2+ is in a high-spin configuration (S=1). The temperature dependence of the inverse magnetic susceptibility follows the Curie-Weiss law in the high-temperature region and shows positive values of the Weiss temperature ~ 8 K (Li3Ni2SbO6) and ~12 K (Na3Ni2SbO6) pointing to the presence of non-negligible ferromagnetic interactions, although the system orders AFM at low temperatures. In addition, the magnetization curves reveal a field-induced (spin-flop type) transition below TN that can be related to the magnetocrystalline anisotropy in these systems. These observations are in agreement with density functional theory calculations, which show that both antiferromagnetic and ferromagnetic intralayer spin exchange couplings between Ni2+ ions are present in the honeycomb planes supporting a zigzag antiferromagnetic ground state. Based on our experimental measurements and theoretical calculations we propose magnetic phase diagrams for the two compounds.
Disciplines :
Physics
Author, co-author :
Zvereva, E.A.;  Lomonosov Moscow State University - MSU
Stratan, M.I.;  Lomonosov Moscow State University - MSU
Ovchenkov, Y.A.;  Lomonosov Moscow State University - MSU
Nalbandyan, V.B.;  Southern Federal University, 344090 Rostov-on-Don, Russia
Lin, J.-Y.;  National Chiao Tung University, Hsinchu, Taiwan
Vavilova, E.L.;  Zavoisky Physical-Technical Institute (ZPhTI) of the Kazan Scientific Center of the Russian Academy of Sciences
Iakovleva, M.F.;  Zavoisky Physical-Technical Institute (ZPhTI) of the Kazan Scientific Center of the Russian Academy of Sciences,
Abdel-Hafiez, M.;  Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Shanghai
Silhanek, Alejandro  ;  Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
Chen, X.-J.;  Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Shanghai
Stroppa, A.;  CNR-SPIN, L'Aquila, Italy
Picozzi, S.;  CNR-SPIN, L'Aquila, Italy
Jeschke, H.O.;  Institut für Theoretische Physik, Goethe-Universität Frankfurt
Valentí, R.;  Institut für Theoretische Physik, Goethe-Universität Frankfurt
Vasiliev, A.N.;  Lomonosov Moscow State University - MSU
More authors (5 more) Less
Language :
English
Title :
Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonates A3Ni2SbO6 (A=Li, Na)
Publication date :
01 October 2015
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
ISSN :
1098-0121
eISSN :
1550-235X
Publisher :
American Physical Society, Woodbury, United States - New York
Volume :
92
Pages :
144401
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 September 2015

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