Europium Monoxide: Semiconductor and Ferromagnet for Spintronics

ISBN-13: 9783030095710 / Angielski / Miękka / 2019 / 189 str.

Arnold S. Borukhovich; Alexey V. Troshin

Spis treści

Introduction 

PART I.  EuO - ferromagnetic and semiconductor

Chapter 1. Features of formation of electron band structure and physical properties of ferromagnetic        semiconductor EuO

1.1. Band structure and magnetism 

1.2. Electrical and photo optical characteristics 

1.3. Magnetic characteristics 

1.4. Effect of high pressure on the magnetic and electrical parameters 

1.5. Magneto-optical and microwave Parameters 

1.6. Ferromagnetic and electron paramagnetic resonance 

1.7. Critical behavior of magnetic and thermodynamic parameters 

1.8. Magnetic polaron and transition metal - insulator

Chapter 2. Methods of synthesis of europium monoxide

2.1. Thermal analysis system Eu₂O₃: C and the thermal reduction method of carbon Eu₂O₃
2.2. Metallothermic reduction Eu&

lt;2O₃
2.3. Thermal characteristics of europium monoxide
2.4. Synthesis of single crystals EuO
2.5. Obtaining thin films EuO
2.6. The cationic state films EuO
2.7. The phase diagram of europium - oxygen
2.8. Europium monoxide as a phase of variable composition
2.9. The thermodynamic parameters and specific heat EuO

Chapter 3. Raising the Curie temperature of the ferromagnetic semiconductor EuO

3.1. Physical principles of raising the Curie temperature of the magnetic
       semiconductor and their implementation
3.2. Magnetic impurity states and magnetic quasi-molecule in the doped magnetic      

       semiconductor
3.3. Raising the Curie temperature and the properties of non-degenerate solid
       solutions Eu_1-xSm_xO
3.4. Magnetic quasi-molecule in a ferromagnetic semiconductor with the non-
       degenerate type of conductivity
3.5. Magnetic-thermodynamic study of solid solutions Eu_1-xGd_xO with the quasi metallic 

       type of conductivity
3.6. Features of the critical behavior of the specific heat of solid solutions Eu_1-xGd_xO
3.7. Effect of high pressure on the Curie temperature and magnetization of solid solutions Eu_1-xR_xO

PART II. EuO as a spintronics

Chapter 4. Theoretical background of the Josephson effect in superconducting tunnel    junctions with  ferromagnetic barrier

4.1. Magnetic impurities in superconducting electrodes
4.2. Tunnel Hamiltonian method
4.3. Of the Josephson critical current dependence on the concentration
        paramagnetic im

purities in superconductors
4.4. Paramagnetic impurities in the dielectric barrier
4.5. The ordered magnetic impurities in the dielectric barrier
4.6. Magnetic impurities in the metallic interlayer C / M / C - transition
4.7. Superconducting transitions with the ferromagnetic layer
4.8. Possible mechanisms of pair tunneling through the F- barrier
        and the occurrence of a spin-polarized current transport

Chapter 5. Creating and study of the properties of multilayers and superconducting tunnel junctions with EuO
5.1. Create multilayer planar structures with the participation of films EuO
5.2. A study of current-voltage characteristics of the tunnel junction NbN / EuO / Pb
5.3. The structure of NbN / EuO / Pb in the external magnetic field
5.4. The magnetization of multilayers C / EuO
5.5. The magnetization of multilayers HTS / EuO
Chapter 6. Creating, research and application of h

eterostructures metal / ferromagnetic semiconductor (EuO) and ferromagnetic semiconductor (EuO) / semiconductor
6.1. The structure of metal / ferromagnetic semiconductor (EuO) as a solid-state source of spin- polarized electrons
6.2. The structure of metal / ferromagnetic semiconductor (EuO) as magnetically (spin) diode
6.3. The structure of ferromagnetic semiconductor (EuO) / semiconductor as a base 

       submillimeter spin electronics

6.4. Creating heterostructures ferromagnetic semiconductor (EuO) / semiconductor and method of frequency measurement

6.5. Observation microwave and submicrowave radiation in spin transport in heterostructures  FS (EuO) / S  and  FM / S

6.6. Estimates opportunities stimulated microwave FS / S heterostructures
6.7. The formation of a standing wave and evaluation of thermal and quantum FS / S heterostructures noises 

Chapter

7. Creating a high-spin injector based EuO

7.1. Search and creation of spin injectors based on composite materials
7.2. Synthesis and properties of composite EuO: Fe - high-temperature spintronics
7.3. Research spintronics EuO: Fe by Mössbauer spectroscopy method
7.4. Electronic band structure of the solid solution Eu_1-xFe_xO. Calculation and
       comparison with experimental data for EuO: Fe composite
7.5. Spintronics EuO: Fe in contact with the nonmagnetic semiconductor
7.6. Tasks to create a spin transistor with an injector EuO: Fe
Conclusion
References 

O autorze

Arnold S. Borukhovich obtained his doctorate in physics and mathematics in 1989. The second doctor degree in physics and mathematics he received in 1989 at the Institute of Ural Branch of Russian Academy of Sciences with a work “Thermodynamic peculiarities and phases transitions at the magnetic semiconductors based on 3d and 4f metals”. In 1997 he became professor at the Russian State Vocational Pedagogical University, Yekaterinburg.

His research interests concern: physics of variable composition phases, physics of magnets and magnetic phase transitions,physics and chemistry of the magnetic semiconductors, semiconductor spintronics, weak superconductivity and tunnel junctions.  

Blurb

This book presents the physical characteristics and possible device applications of europium monoxide as well as materials based on it. It reveals the suitability of this material for device applications in super- and semiconductor spin electronics. Ferromagnetic semiconductors like europium monoxide have contributed to a fascinating research field in condensed matter physics. In the book are presented the electronic and magnetic properties and thermal and resonance parameters of this material, its peculiarities in external fields as a function of non-stoichiometry, doping level, both in single-crystal and thin-film states. Particular attention is paid to the possibility to use this monoxide or its solid solutions (composites) unconventionally for creating spin electronics structures which work at room temperature conditions. 

This book appeals to researchers, graduate students and professionals engaged in the development of semiconductor spin electronics and computer dev

ices, technologists and theoretical physicists. It is important for the calculation, development and creation of spin memory devices for a quantum computer.