Spin-polarized tunneling in nanostructured La2/3Sr1/3MnO3

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

doi:10.1016/S0921-4526(02)00654-3

Spin-polarized tunneling in nanostructured La_2/3Sr_1/3MnO₃

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

Instituto Bolseiro

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

Resumen

We present magnetic and transport properties of nanocrystalline La_2/3Sr_1/3MnO₃ powders prepared by a gel-combustion method using citric acid as the fuel. The coercive magnetic field H_c is significantly different to the field H*_c for which the magnetoresistance (MR) is maximum. The MR at low fields (LFMR) exhibits a power-law dependence with magnetization, MR ∝ Mⁿ, with n = 2.5-3.3 for temperatures ranging from 5 to 200 K. The results are discussed in terms of a distribution of particle size in our sample.

Idioma original	Inglés
Páginas (desde-hasta)	104-106
Número de páginas	3
Publicación	Physica B: Condensed Matter
Volumen	320
N.º	1-4
DOI	https://doi.org/10.1016/S0921-4526(02)00654-3
Estado	Publicada - jul. 2002
Publicado de forma externa	Sí

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title = "Spin-polarized tunneling in nanostructured La2/3Sr1/3MnO3",

abstract = "We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared by a gel-combustion method using citric acid as the fuel. The coercive magnetic field Hc is significantly different to the field H*c for which the magnetoresistance (MR) is maximum. The MR at low fields (LFMR) exhibits a power-law dependence with magnetization, MR ∝ Mn, with n = 2.5-3.3 for temperatures ranging from 5 to 200 K. The results are discussed in terms of 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",

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doi = "10.1016/S0921-4526(02)00654-3",

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TY - JOUR

T1 - Spin-polarized tunneling in nanostructured La2/3Sr1/3MnO3

AU - Lamas, D. G.

AU - Caneiro, A.

AU - Niebieskikwiat, D.

AU - Sánchez, R. D.

AU - García, D.

AU - Alascio, B.

PY - 2002/7

Y1 - 2002/7

N2 - We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared by a gel-combustion method using citric acid as the fuel. The coercive magnetic field Hc is significantly different to the field H*c for which the magnetoresistance (MR) is maximum. The MR at low fields (LFMR) exhibits a power-law dependence with magnetization, MR ∝ Mn, with n = 2.5-3.3 for temperatures ranging from 5 to 200 K. The results are discussed in terms of a distribution of particle size in our sample.

AB - We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared by a gel-combustion method using citric acid as the fuel. The coercive magnetic field Hc is significantly different to the field H*c for which the magnetoresistance (MR) is maximum. The MR at low fields (LFMR) exhibits a power-law dependence with magnetization, MR ∝ Mn, with n = 2.5-3.3 for temperatures ranging from 5 to 200 K. The results are discussed in terms of a distribution of particle size in our sample.

KW - Low-field magnetoresistance

KW - Nanostructured materials

KW - Spin-polarized tunneling

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U2 - 10.1016/S0921-4526(02)00654-3

DO - 10.1016/S0921-4526(02)00654-3

M3 - Artículo

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SN - 0921-4526

VL - 320

SP - 104

EP - 106

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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