T. SudyoadsukR. SuryanarayananP. WinotaiMahidol UniversityUniversite Paris-Sud XI2018-06-212018-06-212005-01-04Materials Research Bulletin. Vol.40, No.1 (2005), 159-166002554082-s2.0-10444279156https://repository.li.mahidol.ac.th/handle/20.500.14594/16637We have carried out structural, magnetic and magneto transport measurements of the electron-doped manganite La0.3Ca0.7MnO3substituted with 10% of Cr, Fe and Won the Mn site. The substitution by Cr, Fe and W suppresses the charge order transition present at 260 K in the parent compound. All the samples show a semiconducting behavior. Whereas the parent compound does not show any magneto resistance (MR) even in a field of 14 T, a maximum MR of 6% in 5 T at 25 K is observed for the Cr substituted sample that is attributed to a spin-cluster glass like states induced by Cr. The Fe and W substituted samples showed a MR of 1.5 and 3%, respectively which may be attributed to a smaller number of FM domains/spin-clusters and to an increase in anti-ferromagnetic interaction. © 2004 Elsevier Ltd. All rights reserved.Mahidol UniversityMaterials ScienceArticleSCOPUS10.1016/j.materresbull.2004.09.012