Study of magnetic properties of La2/3Sr1/3MnO3 nanotubes by Monte Carlo simulation

被引:7
作者
Cuchillo, A. [1 ]
Vargas, P. [1 ]
Levy, P. [2 ]
Sanchez, R. D. [3 ]
Curiale, J. [3 ]
Leyva, A. G. [2 ]
Troiani, H. E. [3 ]
机构
[1] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile
[2] CNEA, Ctr Atom Constituyentes, RA-1650 San Martin Buenos Aires, Argentina
[3] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
关键词
Monte Carlo; nanotube; magnetism; manganite;
D O I
10.1016/j.jmmm.2008.02.177
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Magnetic properties of a single nanotube whose walls are constituted by nanograins of La(2/3)Sr(1/3)MnO(3) are studied by means of Monte Carlo ( MC) simulation. The system is considered as composed by ferromagnetic grains which couple via dipolar interaction. The grain size distribution is obtained from experimental measurements and the inter-grain distance distribution is obtained from a study of distance distribution among magnetic particles distributed in the tube walls. We show the magnetization behavior for a tube of 700nm of diameter and 3.5 mu m length. We discuss the simulation for different temperatures and external fields. As a main result, we show that the distribution of inter-granular distances has a unique behavior for tubular structures of similar diameter/length aspect ratio, independent of their sizes. This scaling relation allows us to perform the simulations using a tube of smaller dimensions. We succeed in explaining the magnetization curves, finding that dipolar interaction is necessary to explain the experimental behavior and that the grains behave as having magnetic dead layers. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:E331 / E334
页数:4
相关论文
共 11 条
[1]   High-field magnetoresistance at interfaces in manganese perovskites [J].
Balcells, L ;
Fontcuberta, J ;
Martínez, B ;
Obradors, X .
PHYSICAL REVIEW B, 1998, 58 (22) :14697-14700
[2]   Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments [J].
Bowen, M ;
Bibes, M ;
Barthélémy, A ;
Contour, JP ;
Anane, A ;
Lemaitre, Y ;
Fert, A .
APPLIED PHYSICS LETTERS, 2003, 82 (02) :233-235
[3]  
CHIKAZUMI S, 1997, PHYS FERROMAGNETISM, P74105
[4]   Mixed-valence manganites [J].
Coey, JMD ;
Viret, M ;
von Molnár, S .
ADVANCES IN PHYSICS, 1999, 48 (02) :167-293
[5]   Room-temperature ferromagnetism in La2/3Sr1/3MnO3 nanoparticle assembled nanotubes -: art. no. 043113 [J].
Curiale, J ;
Sánchez, RD ;
Troiani, HE ;
Leyva, AG ;
Levy, P .
APPLIED PHYSICS LETTERS, 2005, 87 (04)
[6]   Colossal magnetoresistant materials: The key role of phase separation [J].
Dagotto, E ;
Hotta, T ;
Moreo, A .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153
[7]   Nanotechnology - Dreams of a hollow future [J].
Hueso, L ;
Mathur, N .
NATURE, 2004, 427 (6972) :301-+
[8]   Nanotubes of rare-earth manganese oxide [J].
Levy, P ;
Leyva, AG ;
Troiani, HE ;
Sánchez, RD .
APPLIED PHYSICS LETTERS, 2003, 83 (25) :5247-5249
[9]   Microwave assisted synthesis of manganese mixed oxide nanostructures using plastic templates [J].
Leyva, AG ;
Stoliar, P ;
Rosenbusch, M ;
Lorenzo, V ;
Levy, P ;
Albonetti, C ;
Cavallini, M ;
Biscarini, F ;
Troiani, HE ;
Curiale, J ;
Sanchez, RD .
JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (11) :3949-3953
[10]   Ferromagnetic resonance in a crystal of La0.7Sr0.3MnO3 [J].
Lofland, SE ;
Bhagat, SM ;
Kwon, C ;
Tyagi, SD ;
Mukovskii, YM ;
Karabashev, SG ;
Balbashov, AM .
JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :5737-5738