Multiple magnetic phase transitions with different universality classes in bilayer La1.4Sr1.6Mn2O7 manganite

被引：11
作者：
Kumar, Birendra [1 ]
Tiwari, Jeetendra Kumar [1 ]
Chauhan, Harish Chandr [1 ]
Ghosh, Subhasis [1 ]
机构：
[1] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India
来源：
SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期
关键词：
METAL-INSULATOR-TRANSITION; LONG-RANGE ORDER; CRITICAL-BEHAVIOR; SPIN-WAVES; COLOSSAL MAGNETORESISTANCE; NEUTRON-SCATTERING; DOUBLE-EXCHANGE; ENTROPY CHANGE; LA1.2SR1.8MN2O7; MONOLAYER;
D O I：
10.1038/s41598-021-00544-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Here, we report three magnetic transitions at 101 K (TC1), 246 K (TC2) and 295 K (TC3) in bilayer La1.4Sr1.6Mn2O7. 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 TC1, TC2 and TC3 have been studied by MAPs and Kouvel-Fisher method. Based on these analyses four magnetic phases are: (1) 2D Ising ferromagnetic (FM) below TC1,(2) 2D Heisenberg canted antiferromagnetic (CAFM-I) and FM clusters in temperature range TC1 < T < TC2, (3) 2D Heisenberg CAFM-II and FM clusters with non magnetically interacting planes in temperature range TC2 < T < TC3 and (4) paramagnetic for T > TC3.
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页数：17
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