Magnetic properties, magnetoresistivity and magnetocaloric effect in Gd_xLa_(1-x)-MnSi alloys  

作　　者：T.I.Ivanova S.A.Nikitin W.Suski G.A.Tskhadadze I.A.Ovtchenkova D.Badurski 

机构地区：[1]Physics Department, Moscow State University, 119992, Moscow, Russia [2]International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland [3]Polish Academy of Sciences, Trzebiatowski Institute of Low Temperatures and Structure Research, P.O.Box 1410, 50-950 Wroclaw 2, Poland

出　　处：《Journal of Rare Earths》2009年第4期684-687,共4页稀土学报（英文版）

基　　金：supported by the Federal Program on Support of Leading Scientific Schools (НШ-8701.2006.2)

摘　　要：The results of magnetization, magnetoresistivity and magnetocalofic effect （MCE） studies performed on polycrystalline samples of the GdxLa1-xMnSi （x=0.5, 0.6, 0.7, 0.8, 0.9, 1.0） compounds were presented. Complex measurements were carried out on the GdxLa1-xMnSi compounds to determine the influence of substitution in the rare earth （R） sublattice on the magnetic and related properties of these compounds. The compounds with x≤0.6 demonstrated two magnetic phase transitions （ferromagnetic to paramagnetic and antiferro- magnetic to ferromagnetic） both of which were first order. Anomalies in the magnetocaloric effect, electroresistivity and magnetoresistivity were observed in the temperature ranges of the magnetic phase transitions. The temperature dependences of MCE and magnetoresistivity for these compounds correlated with the temperature dependence of magnetization.The results of magnetization, magnetoresistivity and magnetocalofic effect （MCE） studies performed on polycrystalline samples of the GdxLa1-xMnSi （x=0.5, 0.6, 0.7, 0.8, 0.9, 1.0） compounds were presented. Complex measurements were carried out on the GdxLa1-xMnSi compounds to determine the influence of substitution in the rare earth （R） sublattice on the magnetic and related properties of these compounds. The compounds with x≤0.6 demonstrated two magnetic phase transitions （ferromagnetic to paramagnetic and antiferro- magnetic to ferromagnetic） both of which were first order. Anomalies in the magnetocaloric effect, electroresistivity and magnetoresistivity were observed in the temperature ranges of the magnetic phase transitions. The temperature dependences of MCE and magnetoresistivity for these compounds correlated with the temperature dependence of magnetization.

关 键 词：magnetocaloric effect MAGNETORESISTIVITY magnetic phase Iransition itinerant magnetism rare earths 

分 类 号：TG131[一般工业技术—材料科学与工程]