The formation of the complex manganites LnSr2Mn2O7 (Ln = La, Nd, Gd)

被引：6

作者：

Missyul, A. B. ^{[1
]}

Zvereva, I. A. ^{[1
]}

Palstra, T. T. M. ^{[2
]}

机构：

[1] St Petersburg State Univ, Dept Chem, St Petersburg 198504, Russia

[2] Univ Groningen, Solid State Chem Lab, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

来源：

MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 12期

基金：

俄罗斯基础研究基金会;

关键词：

Layered compounds; X-ray diffraction; Differential scanning calorimetry (DSC); Crystal structure; Magnetic properties; RUDDLESDEN-POPPER PHASES; COLOSSAL MAGNETORESISTANCE; MANGANESE OXIDES; MECHANISM; KINETICS;

D O I：

10.1016/j.materresbull.2012.08.080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The process of formation of the Ruddlesden-Popper phases LnSr(2)Mn(2)O(7) (Ln = La, Nd, Gd) was investigated by means of X-ray diffraction, thermal analysis and microprobe analysis. Two parallel pathways were found for the reaction. The first one includes the formation of the intermediate K2NiF4-type compound by interaction of Sr7Mn4O15 and perovskite-type solid solution (Ln,Sr)MnO3, while in the second one the K2NiF4-type intermediate is formed during the reaction of the same perovskite-type solid solution with the corresponding rare earth oxide. This result gives an explanation for the formation of two phases with slightly different cationic compositions. The kinetics of the reaction was investigated for both mechanisms resulting in determination of their relative contribution to the final composition. Pure NdSr2Mn2O7 was obtained using a step-by-step process according to the first mechanism, and the magnetic properties of this phase were investigated. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：4156 / 4160

页数：5

共 17 条

[1] Crystal and magnetic structures of the colossal magnetoresistance manganates Sr2-xNd1+xMn2O7 (x=0.0, 0.1)
Battle, PD
Green, MA
Laskey, NS
Millburn, JE
Radaelli, PG
Rosseinsky, MJ
Sullivan, SP
Vente, JF
[J]. PHYSICAL REVIEW B, 1996, 54 (22): : 15967 - 15977
[2] Layered Ruddlesden-Popper manganese oxides: Synthesis and cation ordering
Battle, PD
Green, MA
Laskey, NS
Millburn, JE
Murphy, L
Rosseinsky, MJ
Sullivan, SP
Vente, JF
[J]. CHEMISTRY OF MATERIALS, 1997, 9 (02) : 552 - 559
[3] Colossal magnetoresistance in Sr2-xNd1+xMn2O7 (x=0.0,0.1)
Battle, PD
Blundell, SJ
Green, MA
Hayes, W
Honold, M
Klehe, AK
Laskey, NS
Millburn, JE
Murphy, L
Rosseinsky, MJ
Samarin, NA
Singleton, J
Sluchanko, NE
Sullivan, SP
Vente, JF
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (32) : L427 - L434
[4] Magnetotransport studies on the Ruddlesden Popper phases Sr2RMn2O7 (R = Nd, Pr, Ho, Y) and Sr2-xNd1+xMn2O7 (x = 0, 0.1, 0.2, 0.5)
Coldea, AI
Spring, LE
Blundell, SJ
Singleton, J
Hayes, W
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (46) : 9053 - 9072
[5] Observation of low field magnetoresistance in the layered manganite Sr1.6Sm1.4Mn2O7
Hur, NH
Chi, EO
Kwon, YU
Yu, J
Kim, JT
Park, YK
Park, JC
[J]. SOLID STATE COMMUNICATIONS, 1999, 112 (02) : 61 - 65
[6] Missyul A.B., 2006, VESTN ST PETERB GO 4, V2, P46
[7] Giant magnetoresistance of manganese oxides with a layered perovskite structure
Moritomo, Y
Asamitsu, A
Kuwahara, H
Tokura, Y
[J]. NATURE, 1996, 380 (6570) : 141 - 144
[8] Neutron scattering investigation of magnetic bilayer correlations in La1.2Sr1.8Mn2O7:: Evidence of canting above TC
Osborn, R
Rosenkranz, S
Argyriou, DN
Vasiliu-Doloc, L
Lynn, JW
Sinha, SK
Mitchell, JF
Gray, KE
Bader, SD
[J]. PHYSICAL REVIEW LETTERS, 1998, 81 (18) : 3964 - 3967
[9] Colossal magnetoresistance in La2-2xSr1+2xMn2O7 single crystals
Prellier, W
Suryanarayanan, R
Dhalenne, G
Berthon, J
Renard, JP
Dupas, C
Revcolevschi, A
[J]. PHYSICA B-CONDENSED MATTER, 1999, 259-61 : 833 - 834
[10] Structural evolution and electronic properties of La1+xSr2-xMn2O7
Seshadri, R
Martin, C
Hervieu, M
Raveau, B
Rao, CNR
[J]. CHEMISTRY OF MATERIALS, 1997, 9 (01) : 270 - 277

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