Effect of Crystallite Size on the Thickness of Nonmagnetic Shell and Magnetic Properties of La0.7Ca0.3MnO3

被引：12

作者：

Thi Anh Ho ^{[1
]}

Tran Dang Thanh ^{[2
]}

The-Long Phan ^{[1
]}

Oh, Suhk Kun ^{[1
]}

Yu, Seong-Cho ^{[1
]}

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[2] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2015年 / 28卷 / 03期

关键词：

Nanocrystals; Perovskite manganites; Magnetic properties; Core/shell-like structure;

D O I：

10.1007/s10948-014-2763-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

La0.7Ca0.3MnO3 compounds with the crystallite size of D = 45-200 nm were synthesized by utilizing the solid-state reaction and mechanical ball milling methods. The reduction of the crystallite size (D) resulted in the decrease of both T (C) and magnetization, broadening of the phase transition region, and appearance of Griffiths phase features in the materials. The temperature dependence of saturation magnetization (M (S)), the variations of the coercivity (H (C)), and the deviation of magnetization from expected Bloch's law T (3/2) for these samples were also investigated. Based on the core-shell model, the core diameter and the nonmagnetic shell thickness for the samples were determined.

引用

页码：891 / 894

页数：4

共 14 条

[1] Thermal Diffusivity and Related Properties of Colossal Magnetoresistive La0.67Ca0.33MnO3 With Various Grain Sizes [J].

Alwi, H. A. ;

Abd-Shukor, R. .

IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (07) :2899-2901

[2] Magnetism of manganite nanotubes constituted by assembled nanoparticles [J].

Curiale, J. ;

Sanchez, R. D. ;

Troiani, H. E. ;

Ramos, C. A. ;

Pastoriza, H. ;

Leyva, A. G. ;

Levy, P. .

PHYSICAL REVIEW B, 2007, 75 (22)

[3] Enhanced grain surface effect on magnetic properties of nanometric La0.7Ca0.3MnO3 manganite: Evidence of surface spin freezing of manganite nanoparticles [J].

Dey, P. ;

Nath, T. K. ;

Manna, P. K. ;

Yusuf, S. M. .

JOURNAL OF APPLIED PHYSICS, 2008, 104 (10)

[4] MAGNETIC-PROPERTIES OF ULTRAFINE IRON PARTICLES [J].

GANGOPADHYAY, S ;

HADJIPANAYIS, GC ;

DALE, B ;

SORENSEN, CM ;

KLABUNDE, KJ ;

PAPAEFTHYMIOU, V ;

KOSTIKAS, A .

PHYSICAL REVIEW B, 1992, 45 (17) :9778-9787

[5]

Kittel C., 2000, INTRO SOLID STATE PH, P423

[6] Nanoscale crystal imperfection-induced characterization changes of manganite nanolayers with various crystallographic textures [J].

Liang, Yuan-Chang ;

Zhong, Hua ;

Liao, Wen-Kai .

NANOSCALE RESEARCH LETTERS, 2013, 8 :1-7

[7]

López-Quintela MA, 2003, NANOTECHNOLOGY, V14, P212, DOI 10.1088/0957-4484/14/2/322

[8] Magnetostatic interactions in magnetic nanoparticle assemblies: energy, time and length scales [J].

Majetich, S. A. ;

Sachan, M. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2006, 39 (21) :R407-R422

[9] Size effects and interactions in La0.7Ca0.3MnO3 nanoparticles [J].

Manh, D. H. ;

Phong, P. T. ;

Thanh, T. D. ;

Nam, D. N. H. ;

Hong, L. V. ;

Phuc, N. X. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (05) :1373-1377

[10] Enhanced Magnetotransport in Nanopatterned Manganite Nanowires [J].

Marin, Lorena ;

Morellon, Luis ;

Algarabel, Pedro A. ;

Rodriguez, Luis A. ;

Magen, Cesar ;

De Teresa, Jose M. ;

Ibarra, Manuel R. .

NANO LETTERS, 2014, 14 (02) :423-428

← 1 2 →