| ABSTRACT | 第3-5页 |
| Chapter 1 Introduction | 第8-35页 |
| 1.1 Multiferroics and magnetoelectric effect | 第8-14页 |
| 1.2 Magnetoelectric composites | 第14-22页 |
| 1.2.1 Magnetoelectric coupling in magnetoelectric composites | 第15-16页 |
| 1.2.2 Types of magnetoelectric composites | 第16-22页 |
| 1.3 Electric field tuning of Magnetism | 第22-28页 |
| 1.3.1 Electric field control of magnetism in bulk composites | 第22-23页 |
| 1.3.2 Electric field control of magnetism in nanostructure composites | 第23-28页 |
| 1.4 Novel Device Design and Applications | 第28-31页 |
| 1.4.1 Novel Magnetoelectric Memories | 第29-30页 |
| 1.4.2 Magnetoelectric Sensors | 第30页 |
| 1.4.3 Other Possibilities | 第30-31页 |
| 1.5 Motivation and Thesis Plan | 第31-35页 |
| 1.5.1 Motivation of the thesis | 第31-32页 |
| 1.5.2 Thesis plan | 第32-35页 |
| Chapter 2 Experimental Approach | 第35-50页 |
| 2.1 Starting Chemicals | 第36-37页 |
| 2.2 Nanocomposite preparation procedure | 第37-39页 |
| 2.3 Particulate composite preparation | 第39页 |
| 2.4 Structure Characterization | 第39-42页 |
| 2.4.1 X-ray Diffraction Analysis | 第40页 |
| 2.4.2 Scanning Electron Microscope | 第40-41页 |
| 2.4.3 Transmission Electron Microscope | 第41-42页 |
| 2.5 Electro-static property measurement | 第42-43页 |
| 2.6 Magneto-static property measurement | 第43-44页 |
| 2.7 Magnetoelectric effect Measurement | 第44-50页 |
| Chapter 3 Electric field Control of Magnetoelectric Coupling and Relaxation in Rhombohedral LiNbO_3-CoFe_2O_4Nanocomposite | 第50-76页 |
| 3.1 Introduction | 第50-56页 |
| 3.2 Magneto- and electro-static properties of LNO-CFO composite | 第56-64页 |
| 3.2.1 Magneto-static properties of LNO-CFO composite | 第56-58页 |
| 3.2.2 Vogel-Fulcher-like dielectric relaxation | 第58-64页 |
| 3.3 Electric field control of magnetization and relaxation in LNO-CFO composite | 第64-70页 |
| 3.4 Temperature dependence of magnetodielectric effect in LNO-CFO composites | 第70-75页 |
| 3.5 Conclusion | 第75-76页 |
| Chapter 4 Electric Field Control of Magnetoelectric coupling and relaxation in NaNbO_3-CoFe_2O_4 | 第76-92页 |
| 4.1 Introduction | 第76-77页 |
| 4.2 Preparation and Characterization of NNO-CFO composite | 第77-80页 |
| 4.3 Magneto- and Electro-static properties for NNO-CFO composite | 第80-84页 |
| 4.4 Magnetodielectric coupling in NNO-CFO composite | 第84-86页 |
| 4.5 Magnetoelectric effect in NNO-CFO | 第86-91页 |
| 4.6 Conclusion | 第91-92页 |
| Chapter 5 Magnetodielectric and Magnetoelectric effect in NaNbO3-NiFe2O4composite | 第92-105页 |
| 5.1 Introduction | 第92-93页 |
| 5.2 Preparation and Characterization of NNO-NFO System | 第93-94页 |
| 5.2.1 Sample preparation | 第93页 |
| 5.2.2 Sample characterization | 第93-94页 |
| 5.3 Magnetodielectric effect in 50NNO-50NFO particulate composite | 第94-98页 |
| 5.4 Resonance Magnetoelectric effect in (100-x)NNO-xNFO composite | 第98-103页 |
| 5.5 Conclusion | 第103-105页 |
| Chapter 6 Electric Field Control of Magnetism in (Co,Mg)(Al,Fe)_2O_4 System | 第105-116页 |
| 6.1 Introduction | 第105-107页 |
| 6.2 Preparation and Characterization of (Co,Mg)(Al,Fe)_2O_4System | 第107-109页 |
| 6.2.1 Sample preparation | 第107页 |
| 6.2.2 Characterization of (Co,Mg)(Al,Fe)_2O_4system | 第107-109页 |
| 6.3 Magnetic and dielectric properties of (Co,Mg)(Al,Fe)_2O_4system | 第109-112页 |
| 6.3.1 Magnetic properties of (Co,Mg)(Al,Fe)_2O_4system | 第109-111页 |
| 6.3.2 Dielectric properties of (Co,Mg)(Al,Fe)_2O_4system | 第111-112页 |
| 6.4 Electric Field Control of magnetization in (Co,Mg)(Al,Fe)_2O_4system | 第112-115页 |
| 6.5 Conclusion | 第115-116页 |
| Chapter 7 Summary and Suggesting Future Work | 第116-120页 |
| 7.1 Summary | 第116-118页 |
| 7.2 Suggesting Future Work | 第118-120页 |
| References | 第120-138页 |
| Publications | 第138-140页 |
| Acknowledgements | 第140-141页 |
