Intrinsic and extrinsic magnetic properties of the naturally layered manganites

Structural and magnetic properties of the two-layered Ruddlesden-Popper phase SrO(La{sub 1{minus}x}Sr{sub x}MnO{sub 3}){sub 2} with x = 0.3--0.5 are highlighted. Intrinsic properties of these naturally layered manganites include a colossal magnetoresistance, a composition-dependent magnetic anisotropy, and almost no remanence. Above the Curie temperature there is a non-vanishing extrinsic magnetization attributed to intergrowths (stacking faults in the layered structure). These lattice imperfections consist of additional or missing manganite layers, as observed in transmission electron microscopy. Their role in influencing the properties of the host material is highlighted.

[1]  Y. Tomioka,et al.  Colossal magnetoresistive manganites , 1999 .

[2]  Jonathan Z. Sun,et al.  Spin-polarized transport and magnetoresistance in magnetic oxides , 1999 .

[3]  J. E. Millburn,et al.  Optimal T-C layered manganites : different roles of coherent and incoherent lattice distortions. , 1999 .

[4]  Irving Bacheller.  Charge Melting and Polaron Collapse in La1.2Sr1.8Mn2O7 , 1999, cond-mat/9907304.

[5]  D. Miller,et al.  Direct imaging of the first order spin flop transition in the layered manganite La{sub 1.4}Sr{sub 1.6}Mn{sub 2}O{sub 7}. , 1999, cond-mat/9904047.

[6]  Dean J. Miller,et al.  Role of intergrowths in the properties of the naturally layered manganites , 1998 .

[7]  Dean J. Miller,et al.  Role of intergrowths in the properties of naturally layered manganite single crystals (invited) , 1998 .

[8]  J. Mitchell,et al.  Magnetic correlations in the bilayer manganite La1.2Sr1.8Mn2O7 , 1998 .

[9]  Masatoshi Imada,et al.  Metal-insulator transitions , 1998 .

[10]  K. Gray,et al.  Magnetic Correlations In The Bilayer Manganite La/sub 1.2/Sr/sub 1.8/Mn/sub 2/O/sub 7/ , 1998, 7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275).

[11]  S. Bader.  Two-Dimensional Intrinsic and Extrinsic Ferromagnetic Behavior of Layered La1.2Sr1.8Mn2O7 Single Crystals , 1998 .

[12]  M. Hervieu,et al.  Study of the Layered Magnetoresistive Perovskite La1.2Sr1.8Mn2O7 by High-Resolution Electron Microscopy and Synchrotron X-ray Powder Diffraction , 1997 .

[13]  G. Aeppli,et al.  Antiferromagnetic Short Range Order in a Two-Dimensional Manganite Exhibiting Giant Magnetoresistance , 1997 .

[14]  J. Goodenough,et al.  Sign Reversal of the Mn-O Bond Compressibility in La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} below {ital T}{sub {ital C}}: Exchange Striction in the Ferromagnetic State , 1997 .

[15]  J. Mitchell,et al.  Charge delocalization and structural response in layered La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}: Enhanced distortion in the metallic regime , 1997 .

[16]  Y. Tomioka,et al.  Interplane Tunneling Magnetoresistance in a Layered Manganite Crystal , 1996, Science.

[17]  Sullivan,et al.  Crystal and magnetic structures of the colossal magnetoresistance manganates Sr2-xNd1+xMn2O7 (x=0.0, 0.1). , 1996, Physical review. B, Condensed matter.

[18]  M. Hervieu,et al.  Microstructural and physical properties of layered manganites oxides related to the magnetoresistive perovskites , 1996 .

[19]  Y. Tokura,et al.  Giant magnetoresistance of manganese oxides with a layered perovskite structure , 1996, Nature.

[20]  Matsui,et al.  Magnetic and electronic properties in hole-doped manganese oxides with layered structures: La1-xSr1+xMnO4. , 1995, Physical review. B, Condensed matter.

[21]  Littlewood,et al.  Double exchange alone does not explain the resistivity of La1-xSrxMnO3. , 1995, Physical review letters.

[22]  P. de Gennes,et al.  Effects of Double Exchange in Magnetic Crystals , 1960 .

[23]  Philip W. Anderson,et al.  Considerations on Double Exchange , 1955 .

[24]  Clarence Zener,et al.  Interaction between the d -Shells in the Transition Metals. II. Ferromagnetic Compounds of Manganese with Perovskite Structure , 1951 .