| Abstract | 第4-5页 |
| 1 Introduction | 第8-26页 |
| 1.1 Background | 第8-9页 |
| 1.2 Magnetoresponsive Effects | 第9-12页 |
| 1.2.1 Magnetocaloric Effect (MCE) | 第9-10页 |
| 1.2.2 Magnetostriction | 第10-12页 |
| 1.3 Magnetically ordered MM'X compounds:structure and magnetic properties | 第12-23页 |
| 1.3.1 MnCoSi | 第14-17页 |
| 1.3.2 MnCoGe | 第17-18页 |
| 1.3.3 MnNiGe | 第18-21页 |
| 1.3.4 MnNiSi | 第21-22页 |
| 1.3.5 How to fulfill the magnetostructural coupling in MnM'X alloys | 第22-23页 |
| 1.4 Main content and focus of the thesis | 第23-26页 |
| 2 Experimental methods | 第26-38页 |
| 2.1 Sample preparation methods | 第26-29页 |
| 2.1.1 High-vacuum arc-melting furnace | 第26-27页 |
| 2.1.2 Vacuum tube sealing unit | 第27-28页 |
| 2.1.3 Muffle furnace | 第28-29页 |
| 2.2 Characterization techniques | 第29-38页 |
| 2.2.1 X-ray Diffractometry | 第29-32页 |
| 2.2.2 Differential Scanning Calorimetry | 第32-35页 |
| 2.2.3 Vibrating Sample Magnetometer | 第35-38页 |
| 3 Structural and magnetic properties of Mn_(1-y)Co_yNiSi_(1-x)Ga_x alloys | 第38-48页 |
| 3.1 Structural properties of Mn_(1-y)Co_yNiSi_(1-x)Ga_x bulk alloys | 第38-40页 |
| 3.2 Influence of annealing treatment on structural properties of Mn_(0.6)Co_(0.4)NiSi_(1-x)Ga_xbulk alloys | 第40-43页 |
| 3.3 Structural phase transition of Mn_(0.5)Co_(0.5)NiSi_(1-x)Ga_x bulk alloys | 第43-45页 |
| 3.4 Magnetic properties of Mn_(0.5)Co_(0.5)NiSi_(1-x)Ga_x bulk alloys | 第45-46页 |
| 3.5 Chapter Summary | 第46-48页 |
| 4 Structural and magnetic properties of Mn_(0.7)Co_(0.6)Ni_(0.7)Si_(1-x)Ga_x andMn_(0.7)Co_(0.7)Ni_(0.6)Si_(1-x)Ga_x alloys | 第48-55页 |
| 4.1 Structural properties of Mn_(0.7)Co_(0.6)Ni_(0.7)Si_(1-x)Ga_x and Mn_(0.7)Co_(0.7)Ni_(0.6)Si_(1-x)Ga_x bulkalloys | 第48-51页 |
| 4.2 Magnetostructural transformation in Mn_(0.7)Co_(0.6)Ni_(0.7)Si_(1-x)Ga_x system | 第51-54页 |
| 4.3 Chapter Summary | 第54-55页 |
| 5 Magnetostructural transition and magnetocaloric effect in Mn_(1-y)Co_(2y)Ni_(1-y)Si_(1-x)Ga_x bulk alloys | 第55-72页 |
| 5.1 Structural properties of Mn_(1-y)Co_(2y)Ni_(1-y)Si_(1-x)Ga_x bulk alloys | 第55-59页 |
| 5.2 Magnetostructural transformation in Mn_(0.85)Co_(0.3)Ni_(0.85)Si_(1-x)Ga_x system | 第59-66页 |
| 5.3 Magnetocaloric effect in Mn_(0.85)Co_(0.3)Ni_(0.85)Si_(1-x)Ga_x system | 第66-70页 |
| 5.4 Chapter Summary | 第70-72页 |
| Conclusions | 第72-74页 |
| Acknowledgements | 第74-75页 |
| References | 第75-85页 |
| Appendices | 第85页 |
