Lattice Effects and Irreversible Magnetoresistance in Gd Doped La-Ca-Mn-O

材料科学技术（英文）, 2002, 18(6): 509-512.

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1.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

2.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

3.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

4.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

5.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

6.Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China

基金项目: 国家重点基础研究发展计划(973计划)(G19980613010) the National Scientific and Technological Department of China

Lattice Effects and Irreversible Magnetoresistance in Gd Doped La-Ca-Mn-O

Keywords： Manganese perovskites

The Gd substituting effects for La in La0.67Ca0.33MnO3 has been studied. With increasing the substituting amount of Gd, the phase transition temperature of metal-isolator for the samples decreases, the corresponding peak resistivity increases, the Curie temperature decreases monotonically. The substitution of La-Ca-Mn-O with 11% Gd for La improved the magnetoresistance ratio by an order of magnitude. The effects of substituting Gd can be explained in terms of the lattice effects. An irreversible MR behaviour was observed in Gd-substituting compounds. This effect became marked when the substituting amount of Gd was greater than 7%. A maximum irreversible increment of MR ratio as large as 91% was obtained when Gd substituting amount was 11%.

参考文献

[1]	p.Schiffer;A.P.Ramirez;W.Bao;S.W.Cheong .[J].Physical Review Letters,1995,75:3336.
[2]	W Z Li;S S Xie;L X Qian .[J].科学（上海),1996,274:1701.
[3]	Q Huang;A Santoro;J W Lynn;R W Erwin,J A Borchers,J L Peng,K Ghosh and R L Greene .[J].Physical Review B,1998,58:2684.
[4]	K H Ahn;X W Wu;K Liu;C.L.Chien .[J].Physical Review B,1996,54:15299.
[5]	G Briceno;H Chang;X Sun .[J].科学(上海),1995,270:273.
[6]	J.Gutirrez;A.Pena;J.M.Barandiarán;J.L.Pizarro,T.Hernández,L.Lezama, M.Insansti and T.Rojo .[J].Physical Review B,2000,61:9028.
[7]	S. Jin;H. M. O'Bryan;T. H. Tiefel;M. McCormack;W. W. Rhodes .Large magnetoresistance in polycrystalline La-Y-Ca-Mn-O[J].Applied physics letters,1995(3):382-384.
[8]	H Y Hwang;S W Cheong;P G Radaelli;M.Marezioand B.Batlogg .[J].Physical Review Letters,1995,75:914.
[9]	A J Millis;P B Littlewood;B I Shraiman .[J].Physical Review Letters,1995,74:5144.
[10]	M R Ibarra;P A Algarabel;C Marquina;J.Blascoand J.Garcia .[J].Physical Review Letters,1995,75:3541.
[11]	A Asamitsu;Y Moritomo;Y Tomioka;T.Arima and Y.Tokura .[J].NATURE,1995,373:407.
[12]	J S Zhou;J B Goodenough;J F Mitchell .[J].Physical Review B,2000,61:R9217.
[13]	J Blasco;J Garcia;J M D Teresa;M.R.Ibarra P.A.Algarabel and C.Marquina .[J].Journal of Physics:Condensed Matter,1996,8:7427.
[14]	M Rubinstein;D J Gillespie;J E Snyder;T.M.Tritt .[J].Physical Review B,1997,56:5412.

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Lattice Effects and Irreversible Magnetoresistance in Gd Doped La-Ca-Mn-O

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