Author:
Kumar Birendra,Tiwari Jeetendra Kumar,Chauhan Harish Chandr,Ghosh Subhasis
Abstract
AbstractHere, we report three magnetic transitions at 101 K (T$$_{C1}$$
C
1
), 246 K (T$$_{C2}$$
C
2
) and 295 K (T$$_{C3}$$
C
3
) in bilayer La$$_{1.4}$$
1.4
Sr$$_{1.6}$$
1.6
Mn$$_{2}$$
2
O$$_7$$
7
. The second order phase transitions have been identified at these transition points with the help of change in entropy analysis and modified Arrott plots (MAPs). The critical behavior around T$$_{C1}$$
C
1
, T$$_{C2}$$
C
2
and T$$_{C3}$$
C
3
have been studied by MAPs and Kouvel–Fisher method. Based on these analyses four magnetic phases are: (1) 2D Ising ferromagnetic (FM) below T$$_{C1}$$
C
1
,(2) 2D Heisenberg canted antiferromagnetic (CAFM-I) and FM clusters in temperature range T$$_{C1}$$
C
1
< T < T$$_{C2}$$
C
2
, (3) 2D Heisenberg CAFM-II and FM clusters with non magnetically interacting planes in temperature range T$$_{C2}$$
C
2
< T < T$$_{C3}$$
C
3
and (4) paramagnetic for T > T$$_{C3}$$
C
3
.
Publisher
Springer Science and Business Media LLC
Cited by
13 articles.
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