Colossal Magnetoresistive Manganites

ISBN-13: 9789048165278 / Angielski / Miękka / 2011 / 447 str.

Tapan Chatterji

Opis

This book is a comprehensive account of the present understanding of an important class of perovskite oxide materials with potential industrial applications. The chapters are written by well-known scientists who are on the forefront of the field and have directly contributed to its recent progress. Special care has been taken to maintain a balance between the space devoted to new experimental results and that devoted to recent theoretical developments. The book contains recent experimental and theoretical results on colossal magnetoresistive (CMR) manganites not covered by any other book in the field, and hence this will be very beneficial to graduate students and researchers in condensed matter and applied physics, materials science and solid state chemistry.

Spis treści

1 Crystal and Magnetic Structure from Hole to Electron Doped Manganites.- 1 Introduction.- 2 Crystal Structures.- 3 Charge and Orbital Ordering in Manganites.- 4 General Trends From Hole- to Electron-Doped Manganites.- 5 Orbital Frustration for Mn3+-rich Manganites (0 < x < 1/2).- 6 Stability of the CE-type Charge and Orbital Ordering.- 7 Structure and Magnetism in Electron Doped Manganites.- 2 Approach to the metal-insulator transition in manganites.- 1 Introduction.- 2 Structural and Magnetic Phase Diagram of La1-xCaxMnO3, 0 ? x ? 0.22.- 3 Diffuse Scattering.- 4 Spin Dynamics.- 5 General discussion.- 3 The Electronic Structure, Fermi Surface and Pseudogap in Manganites.- 1 Introduction.- 2 Background and Review.- 3 Experimental Technique- Angle-Resolved Photoemission Spectroscopy (ARPES).- 4 Overview of Electronic Structures.- 5 Near Fermi Energy Electronic Structure Probed by High Resolution Angle Resolved Photoemission Spectroscopy (ARPES).- 6 Summary, Conclusion and Outlook.- 4 Multi-scale Phase Modulations in Colossal Magnetoresistance Manganites.- 1 Introduction.- 2 Phasediagramof La1-xCaxMnO3 revisited.- 3 Phase separation in manganites.- 4 High temperature charge-ordering fluctuation and nano-scale phase coexistence.- 5 X-ray scattering studies of high-temperature charge/orbital correlations.- 6 Conclusions.- 7 Acknowledgements.- 5 Theory of Manganites.- 1 Early Theoretical Studies of Manganites.- 2 Model for Manganites.- 3 Spin-Charge-Orbital Ordering.- 4 Phase-separation scenario.- 5 Concluding Remarks.- 6 Orbital effects in manganites.- 1 Introduction.- 2 Orbital order for x < 1/2.- 3 Quantum effects; optimal doping.- 4 Orbital order for x ? 1/2.- 5 Conclusions.- 6 Acknowledgments.- 7 Magnetic excitations of the double exchange model.- 1 Introduction.- 2 Magnetic Excitations for a Simple Double Exchange Model.- 3 More Realistic Models.- 4 Concluding Remarks.- 8 Spin dynamics of bilayer manganites.- 1 Introduction.- 2 Ruddlesden-Popper phases.- 3 Crystal and magnetic structure of bilayer manganites.- 4 Ferromagnetic phase transition in La1.2Sr1.8Mn2O7.- 5 Spin waves in bilayer manganites.- 6 A theory of ferromagnetic spin waves in infinite-layer and bilayer manganites.- 7 Doping dependence of the exchange energies in bilayer manganites..- 8 Diffuse magnetic scattering from La1.2Sr1.8Mn2O7.- 9 Concluding remarks.- 9 Charge and Orbital Ordering of Manganites Observed by Resonant X-ray Scattering.- 1 Introduction.- 2 Principle of Resonant X-ray Scattering to Observe Charge and Orbital Ordering.- 3 Theory of RXS.- 4 Recent development of Resonant X-ray Scattering.- 5 Resonant Inelastic X-ray Scattering to Observe Orbital Excitations.- 6 Summary.- 7 Acknowledgements.- 10 Theory of Manganites Exhibiting Colossal Magnetoresistance.- 1 Introduction.- 2 Coexisting polaronic and band states.- 3 A new model Hamiltonian for manganites in the strong electron lattice JT coupling regime.- 4 DMFT wth polaronic and band states.- 5 Metal insulator transitions.- 6 Resistivity, CMR and material systematics.- 7 Other unusual properties.- 8 Discussion.