%0 Journal Article %1 WOS:000170708600300 %A Xavier, MM %A Cabral, FAO %A de Araujo, JH %A Chesman, C %A Dumelow, T %A Sasaki, JM %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2001 %I ELSEVIER SCIENCE BV %J JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS %K compounds earth-transition magnetic magnetoresistance; metal oxides} properties; transport {rare %N 1, SI %P 826-828 %R 10.1016/S0304-8853(01)00076-2 %T Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties %V 226 %X The effect of Fe doping (less than or equal to 10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction. resistivity, AC susceptibility, magnetization, and magneto resistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples. (C) 2001 Published by Elsevier Science B.V.

@article{WOS:000170708600300, abstract = {The effect of Fe doping (less than or equal to 10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction. resistivity, AC susceptibility, magnetization, and magneto resistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples. (C) 2001 Published by Elsevier Science B.V.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Xavier, MM and Cabral, FAO and de Araujo, JH and Chesman, C and Dumelow, T and Sasaki, JM}, biburl = {https://www.bibsonomy.org/bibtex/2387ecf9de8d0c2b2a554128764da038b/ppgfis_ufc_br}, doi = {10.1016/S0304-8853(01)00076-2}, interhash = {7cf3f25ca3888b42916e4dcaaaf68026}, intrahash = {387ecf9de8d0c2b2a554128764da038b}, issn = {0304-8853}, journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}, keywords = {compounds earth-transition magnetic magnetoresistance; metal oxides} properties; transport {rare}, note = {International Conference on Magnetism, RECIFE, BRAZIL, AUG 06-11, 2000}, number = {1, SI}, organization = {CNPq; FINEP; CAPES; FACEPE; FAPEST; FAPERJ}, pages = {826-828}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties}, tppubtype = {article}, volume = 226, year = 2001 }