Multiple magnetic phase transitions with different universality classes in bilayer La[Formula: see text]Sr[Formula: see text]Mn[Formula: see text]O[Formula: see text] manganite.

Autor: Kumar B; School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067 India., Tiwari JK; School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067 India., Chauhan HC; School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067 India., Ghosh S; School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067 India.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Oct 27; Vol. 11 (1), pp. 21184. Date of Electronic Publication: 2021 Oct 27.
DOI: 10.1038/s41598-021-00544-8
Abstrakt: Here, we report three magnetic transitions at 101 K (T[Formula: see text]), 246 K (T[Formula: see text]) and 295 K (T[Formula: see text]) in bilayer La[Formula: see text]Sr[Formula: see text]Mn[Formula: see text]O[Formula: see text]. 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[Formula: see text], T[Formula: see text] and T[Formula: see text] have been studied by MAPs and Kouvel-Fisher method. Based on these analyses four magnetic phases are: (1) 2D Ising ferromagnetic (FM) below T[Formula: see text],(2) 2D Heisenberg canted antiferromagnetic (CAFM-I) and FM clusters in temperature range T[Formula: see text] < T < T[Formula: see text], (3) 2D Heisenberg CAFM-II and FM clusters with non magnetically interacting planes in temperature range T[Formula: see text] < T < T[Formula: see text] and (4) paramagnetic for T > T[Formula: see text].
(© 2021. The Author(s).)
Databáze: MEDLINE
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