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S e p t e m b e r 2 4 - 2 6 , 2 0 1 8 | B u d a p e s t , H u n g a r y
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alliedacademies.comYEARS
Magnetic Materials 2018
Materials Science and Nanotechnology
|
Volume 2
MAGNETISM AND
MAGNETIC MATERIALS
2
nd
International Conference on
Grigory Raganyan et al., Mater Sci Nanotechnol 2018, Volume 2
MAGNETISM IN NOVEL FAMILY OF
TRIANGULAR LAYERED ANTIMONATES
MSB
2
O
6
(M=MN, CO, NI, CU)
Grigory Raganyan
1
, Elena Zvereva
1
, Nikulin A
2
, Nalbandyan V
2
,
Kurbakov A
3
, Kuchugura M
4
and
Vasiliev A
1
1
Moscow State University, Russia
2
Southern Federal University, Russia
3
Petersburg Nuclear Physics Institute – NRC Kurchatov Institute, Russia
M
agnetic and thermodynamic properties of four new metastable trigonal
layered MSb
2
O
6
phases (M =Mn, Co, Ni, Cu) were investigated. All com-
pounds have been prepared by the low-temperature ion-exchange reactions.
Except CuSb
2
O
6
, all compounds under study demonstrate a long-range anti-
ferromagnetic order at low temperatures with Neel temperatures ~8 K (Mn),
~11 K (Co) and ~15 K (Ni) respectively. In addition, the magnetization iso-
therms indicate a magnetic field induced spin-reorientation (spin-flop type)
transition below TN at BSF ~ 0.8 T for MnSb
2
O
6
and BSF ~ 8 T for CoSb
2
O
6
re-
spectively, implying two different spin-configurations in the ordered phases.
It is interesting to note that the magnetic properties observed here for these
novel compounds possessing the trigonal layered rosiaite-type structure are
essentially different from those reported for their stable polymorphs MSb
2
O
6
(M=Ni, Co, Cu) with tetragonal trirutile-type structure. Magnetic behavior of
all trirutile-type compounds MSb
2
O
6
(M=Ni, Co, Cu) is quite similar. A charac-
teristic feature is the presence of a wide temperature range where all MSb
2
O
6
with trirutile structure exhibit short-range antiferromagnetic order and the
temperature dependence of the magnetic susceptibility х(T) demonstrates
clear low-dimensional broad maximum at T
max
followed by long-range anti-
ferromagnetic order. Despite the nearly perfect 2D square M
2+
sublattice the
data were well described within the formalism of antiferromagnetic 1D spin
chain. In contrast, new metastable MSb
2
O
6
phases (M=Mn, Co, Ni, Cu) did not
show any sign of low-dimensional behavior and the magnetic susceptibility
nicely follows the Curie-Weiss law over the wide temperature range higher T
N
.
The negative values of Curie-Weiss temperature indicate predominance of
the antiferromagnetic interactions and moderate frustration for the 2D trian-
gular M
2+
magnetic sublattice.
Grigory Raganyan has completed his Bachelor and
Magister degree from Moscow State University, Rus-
sia. Currently, he is pursuing PhD student of Moscow
State University. He is co-author of three articles from
journals with impact factor more than three. His sci-
entific interests include strongly correlated electron
systems, low dimensional magnetism. His Research
activities are related to the fundamental characteriza-
tion of static, dynamic and resonant physical proper-
ties of the new complex oxides.
grigorik275@gmail.comBIOGRAPHY