Magnetic Interactions and Magnetocaloric Effect in (La0.5Pr0.5)0.6Ba0.4MnO3: Effect of A-Site Codoping

被引：12
作者：
Duc, Nguyen Thi My [1 ,2 ,3 ]
Hung, Chang-Ming [1 ]
Huong, Ngo Thu [2 ]
Phan, Manh-Huong [1 ]
机构：
[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA
[2] VNU Univ Sci, Dept Phys, 334 Nguyen Trai, Hanoi, Vietnam
[3] Univ Danang, Univ Sci, Educ, 459 Ton Duc Thang, Da Nang, Vietnam
来源：
JOURNAL OF ELECTRONIC MATERIALS | 2020年 / 49卷 / 04期
关键词：
Perovskite; manganite; magnetocaloric effect; magnetic refrigeration; critical behavior; critical exponents; EQUATION-OF-STATE; CRITICAL-BEHAVIOR; MAGNETORESISTANCE; REFRIGERATION; TRANSITION; TRANSPORT; NICKEL; ORDER; PR; LA;
D O I：
10.1007/s11664-020-07974-6
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The structural, magnetic, and magnetocaloric properties of polycrystalline (La0.5Pr0.5)(0.6)Ba0.4MnO3 (LPBMO), fabricated by a conventional solid-state reaction method, are reported herein. LPBMO undergoes a second-order paramagnetic-ferromagnetic phase transition around a Curie temperature T-C similar to 277 K. The maximum magnetic entropy change -Delta SMmax is similar to 3.22 J kg(-1) K-1 for a magnetic field change of 5 T. Based on the modified Arrott plot and the iterative Kouvel-Fisher methods, a set of critical exponents (beta = 0.514 +/- 0.010, gamma = 1.164 +/- 0.013, and Delta = 3.265 +/- 0.023) have been determined. These values are close to those expected for the mean-field model with long-range interactions below T-C and for the three-dimensional (3D) Ising model with short-range interactions above T-C. The effect of A-site codoping (La, Pr) on the magnetic and magnetocaloric properties of LPBMO has been analyzed and discussed.
引用
收藏
页码：2596 / 2607
页数：12
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