Effect of pressure and magnetic field on bilayer La1.25Sr1.75Mn2O7 single crystal

被引：5
作者：
Arumugam, S [1 ]
Mydeen, K
Fontes, M
Manivannan, N
Vanji, MK
RamaTulasi, KU
Ramos, SM
Saitovitch, EB
Prabhakaran, D
Boothroyd, AT
机构：
[1] Bharathidasan Univ, Sch Phys, High Pressure Low Temp Lab, Tiruchirappalli 620024, India
[2] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil
[3] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil
[4] Univ Oxford, Clarendon Lab, Dept Phys, Oxford OX1, England
来源：
SOLID STATE COMMUNICATIONS | 2005年 / 136卷 / 05期
关键词：
layered manganites; colossal magnetoresistance; hydrostatic pressure;
D O I：
10.1016/j.ssc.2005.07.026
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report the temperature dependence of susceptibility for various pressures, magnetic fields and constant magnetic field of 5 T with various pressures on La2-2xSr1+2xMn2O7 single crystal to understand the effectiveness of pressure and magnetic field in altering the magnetic properties. We find that the Curie temperature, T-c, increases under pressure (dT(c)/dP = 10.9 K/GPa) and it indicates the enhancement of ferromagnetic phase under pressure up to 2 GPa. The magnetic field dependence of T-c is about 26 K for 3 T. The combined effect of pressure and constant magnetic field (5 T) shows dT(c)/dP = 11.3 K/GPa and the peak structure is suppressed and broadened. The application of magnetic field of 5 T realizes 3D spin ordered state below T-c at atmospheric pressure. Both peak structure in chi(c) and 3D spin ordered state are suppressed, and changes to 2D-like spin ordered state by increase of pressure. These results reveal that the pressure and the magnetic field are more competitive in altering the magnetic properties of bilayer manganite La1.25Sr1.75Mn2O7 single crystal. (C) 2005 Elsevier Ltd. All rights reserved.
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收藏
页码：292 / 296
页数：5
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