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 - http://www.scopus.com/inward/record.url?scp=0036505040&partnerID=8YFLogxK
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 -