Transport and magnetic properties of nanocrystalline La2/3Sr1/3MnO3 powders synthesized by a nitrate-citrate gel-combustion process

D. G. Lamas; A. Caneiro; D. Niebieskikwiat; R. D. Sánchez; D. García; B. Alascio

doi:10.1016/S0304-8853(02)00006-9

Transport and magnetic properties of nanocrystalline La_2/3Sr_1/3MnO₃ powders synthesized by a nitrate-citrate gel-combustion process

D. G. Lamas
, A. Caneiro^*
, D. Niebieskikwiat
, R. D. Sánchez
, D. García
, B. Alascio

^*Corresponding author for this work

Instituto Bolseiro

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

We present magnetic and transport properties of nanocrystalline La_2/3Sr_1/3MnO₃ powders prepared following a novel gel-combustion method using citric acid as the fuel. Magnetization (M) and magnetoresistance (MR) loops as a function of the applied magnetic field show that the coercive magnetic field H_c is significantly different to the field H*_c for which the resistance is maximum. A power-law dependence of the MR with magnetization, MR ∝ Mⁿ, with n≥2.5 has been observed at low fields between 5 and 200 K. The results are discussed in terms of spin-polarized tunneling models with a distribution of particle size in our sample.

Original language	English
Pages (from-to)	207-213
Number of pages	7
Journal	Journal of Magnetism and Magnetic Materials
Volume	241
Issue number	2-3
DOIs	https://doi.org/10.1016/S0304-8853(02)00006-9
State	Published - Mar 2002
Externally published	Yes

Keywords

Low-field magnetoresistance
Nanostructured materials
Spin-polarized tunneling

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10.1016/S0304-8853(02)00006-9

Cite this

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title = "Transport and magnetic properties of nanocrystalline La2/3Sr1/3MnO3 powders synthesized by a nitrate-citrate gel-combustion process",

abstract = "We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared following a novel gel-combustion method using citric acid as the fuel. Magnetization (M) and magnetoresistance (MR) loops as a function of the applied magnetic field show that the coercive magnetic field Hc is significantly different to the field H*c for which the resistance is maximum. A power-law dependence of the MR with magnetization, MR ∝ Mn, with n≥2.5 has been observed at low fields between 5 and 200 K. The results are discussed in terms of spin-polarized tunneling models with a distribution of particle size in our sample.",

keywords = "Low-field magnetoresistance, Nanostructured materials, Spin-polarized tunneling",

author = "Lamas, \{D. G.\} and A. Caneiro and D. Niebieskikwiat and S{\'a}nchez, \{R. D.\} and D. Garc{\'i}a and B. Alascio",

year = "2002",

month = mar,

doi = "10.1016/S0304-8853(02)00006-9",

language = "Ingl{\'e}s",

volume = "241",

pages = "207--213",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

number = "2-3",

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TY - JOUR

T1 - Transport and magnetic properties of nanocrystalline La2/3Sr1/3MnO3 powders synthesized by a nitrate-citrate gel-combustion process

AU - Lamas, D. G.

AU - Caneiro, A.

AU - Niebieskikwiat, D.

AU - Sánchez, R. D.

AU - García, D.

AU - Alascio, B.

PY - 2002/3

Y1 - 2002/3

N2 - We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared following a novel gel-combustion method using citric acid as the fuel. Magnetization (M) and magnetoresistance (MR) loops as a function of the applied magnetic field show that the coercive magnetic field Hc is significantly different to the field H*c for which the resistance is maximum. A power-law dependence of the MR with magnetization, MR ∝ Mn, with n≥2.5 has been observed at low fields between 5 and 200 K. The results are discussed in terms of spin-polarized tunneling models with a distribution of particle size in our sample.

AB - We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared following a novel gel-combustion method using citric acid as the fuel. Magnetization (M) and magnetoresistance (MR) loops as a function of the applied magnetic field show that the coercive magnetic field Hc is significantly different to the field H*c for which the resistance is maximum. A power-law dependence of the MR with magnetization, MR ∝ Mn, with n≥2.5 has been observed at low fields between 5 and 200 K. The results are discussed in terms of spin-polarized tunneling models with a distribution of particle size in our sample.

KW - Low-field magnetoresistance

KW - Nanostructured materials

KW - Spin-polarized tunneling

UR - https://www.scopus.com/pages/publications/0036505040

U2 - 10.1016/S0304-8853(02)00006-9

DO - 10.1016/S0304-8853(02)00006-9

M3 - Artículo

AN - SCOPUS:0036505040

SN - 0304-8853

VL - 241

SP - 207

EP - 213

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2-3

ER -

Transport and magnetic properties of nanocrystalline La_2/3Sr_1/3MnO₃ powders synthesized by a nitrate-citrate gel-combustion process

Abstract

Keywords

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