Effects of iron doping on the transport and magnetic behaviour in La0.65Ca0.35Mn1-yFeyO3

被引:56
作者
Hasanain, SK [1 ]
Nadeem, M
Shah, WH
Akhtar, MJ
Hasan, MM
机构
[1] Quaid I Azam Univ, Dept Phys, Islamabad, Pakistan
[2] Pakistan Inst Nucl Sci & Technol, Islamabad, Pakistan
[3] Pakistan Inst Engn & Appl Sci, Islamabad, Pakistan
关键词
D O I
10.1088/0953-8984/12/42/307
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We report on the magnetic and transport measurements in an Fe-doped colossal magnetoresistance compound (La0.65Ca0.35MnO3). Increased spin disorder and a decrease of T-c with increasing Fe content are evident. We find that the resistivity data above T-p fits better to a variable range hopping model and the localization length decreases with Fe content. The variations in the critical temperature T-c, confinement length, magnetic moment and magnetoresistance show a rapid change at about 4-5% Fe. The maximum magnetoresistance is seen to increase consistently with the addition of Fe and increases up to 400% for 8% Fe. The effect of Fe is seen to be consistent with the disruption of the Mn-Mn exchange, possibly due to the formation of magnetic clusters.
引用
收藏
页码:9007 / 9017
页数:11
相关论文
共 25 条
[1]   Magnetic properties and colossal magnetoresistance of La(Ca)MnO3 materials doped with Fe [J].
Ahn, KH ;
Wu, XW ;
Liu, K ;
Chien, CL .
PHYSICAL REVIEW B, 1996, 54 (21) :15299-15302
[2]  
[Anonymous], 1993, CONDUCTION NONCRYSTA
[3]  
Appel J., 1968, Solid State Physics, V21, P193, DOI [DOI 10.1016/S0081-1947(08)60741-9, 10.1016/s0081-1947(08)60741-9]
[4]   Field-induced transition in the paramagnetic state of (Sm0.65Sr0.35)MnO3 associated with magnetic clusters [J].
Borges, RP ;
Ott, F ;
Thomas, RM ;
Skumryev, V ;
Coey, JMD ;
Arnaudas, JI ;
Ranno, L .
PHYSICAL REVIEW B, 1999, 60 (18) :12847-12851
[5]   Evidence for breakdown of ferromagnetic order below TC in the manganite La0.8Ca0.2MnO3 [J].
Chechersky, V ;
Nath, A ;
Isaac, I ;
Franck, JP ;
Ghosh, K ;
Ju, H ;
Greene, RL .
PHYSICAL REVIEW B, 1999, 59 (01) :497-502
[6]   Evidence for magnetic polarons in the magnetoresistive perovskites [J].
DeTeresa, JM ;
Ibarra, MR ;
Algarabel, PA ;
Ritter, C ;
Marquina, C ;
Blasco, J ;
Garcia, J ;
delMoral, A ;
Arnold, Z .
NATURE, 1997, 386 (6622) :256-259
[7]   Transition-element doping effects in La0.7Ca0.3MnO3 [J].
Ghosh, K ;
Ogale, SB ;
Ramesh, R ;
Greene, RL ;
Venkatesan, T ;
Gapchup, KM ;
Bathe, R ;
Patil, SI .
PHYSICAL REVIEW B, 1999, 59 (01) :533-537
[8]   Grain-boundary effects on the magnetoresistance properties of perovskite manganite films [J].
Gupta, A ;
Gong, GQ ;
Xiao, G ;
Duncombe, PR ;
Lecoeur, P ;
Trouilloud, P ;
Wang, YY ;
Dravid, VP ;
Sun, JZ .
PHYSICAL REVIEW B, 1996, 54 (22) :15629-15632
[9]   Structure and magnetic order in La1-xCaxMnO3 (0<x≤0.33) [J].
Huang, Q ;
Santoro, A ;
Lynn, JW ;
Erwin, RW ;
Borchers, JA ;
Peng, JL ;
Ghosh, K ;
Greene, RL .
PHYSICAL REVIEW B, 1998, 58 (05) :2684-2691
[10]   COLOSSAL MAGNETORESISTANCE IN LA-CA-MN-O FERROMAGNETIC THIN-FILMS (INVITED) [J].
JIN, S ;
MCCORMACK, M ;
TIEFEL, TH ;
RAMESH, R .
JOURNAL OF APPLIED PHYSICS, 1994, 76 (10) :6929-6933