Author: Federico Cesura
Publisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
EPITAXIAL GROWTH AND MAGNETIC PROPERTIES OF LOW DIMENSIONAL RARE-EARTH SILICIDES
Author: Federico Cesura
Publisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 165
Book Description
Heavy Rare Earth Superlattices, Epitaxial Growth, Structure and Magnetic Properties
Author: Rui-Rui Du
Publisher:
ISBN:
Category :
Languages : en
Pages : 346
Book Description
Single crystal superlattices of heavy rare earth metals with yttrium have been synthesized by methods of molecular beam epitaxy developed in this thesis research. Studies of the growth behavior of hcp rare earth metals on bcc transition metal (110) and (211) surfaces, using electron and x-ray scattering probes, are presented. The structural and magnetic properties of Dy-Y and Er-Y superlattices oriented on the (0002) axis are also characterized using x-ray diffraction analysis, bulk magnetization measurement and elastic neutron scattering method. Epitaxial growth properties of rare earth metals on bcc metal surfaces are anisotropic. Layer-by-layer growth mode is observed for rare earth (0002) planes grown on bcc (110) surfaces. An epitaxial relationship of the Nishiyama-Wasserman type is confirmed for this orientation. Rare earth (1012) planes can be grown tilted on (211) planes of bcc metals. The interface so formed is an asymmetrical coherent tilt boundary. The tilt angles can be predicted by a geometrical model based on the requirement of interfacial coherence with zero long-range strain. One-dimensional pseudomorphism at monolayer coverage, and subsequent dislocation gliding, with a resulting break of surface symmetry for rare earth layers, are also identified. The surface structure of the rare earth (1012) layer is found to be temperature dependent; within a growth temperature window the surface possesses a coherent double-atomic-step structure. Applications of the spontaneous tilt in the synthesis of new magnetic structures including tilted superlattices and atomic chains, are discussed. Long-range magnetic order is observed in Dy-Y and Er-Y superlattices, and is explained in terms of the RKKY exchange mechanism. The primary differences between the magnetic behavior of superlattices and their constituent magnetic components are that ferromagnetic transitions at low temperature are suppressed. This change is caused by lattice "clamping" to the substrate, which modifies the available magnetoelastic energy and hence also the magnetic phase diagram.
Publisher:
ISBN:
Category :
Languages : en
Pages : 346
Book Description
Single crystal superlattices of heavy rare earth metals with yttrium have been synthesized by methods of molecular beam epitaxy developed in this thesis research. Studies of the growth behavior of hcp rare earth metals on bcc transition metal (110) and (211) surfaces, using electron and x-ray scattering probes, are presented. The structural and magnetic properties of Dy-Y and Er-Y superlattices oriented on the (0002) axis are also characterized using x-ray diffraction analysis, bulk magnetization measurement and elastic neutron scattering method. Epitaxial growth properties of rare earth metals on bcc metal surfaces are anisotropic. Layer-by-layer growth mode is observed for rare earth (0002) planes grown on bcc (110) surfaces. An epitaxial relationship of the Nishiyama-Wasserman type is confirmed for this orientation. Rare earth (1012) planes can be grown tilted on (211) planes of bcc metals. The interface so formed is an asymmetrical coherent tilt boundary. The tilt angles can be predicted by a geometrical model based on the requirement of interfacial coherence with zero long-range strain. One-dimensional pseudomorphism at monolayer coverage, and subsequent dislocation gliding, with a resulting break of surface symmetry for rare earth layers, are also identified. The surface structure of the rare earth (1012) layer is found to be temperature dependent; within a growth temperature window the surface possesses a coherent double-atomic-step structure. Applications of the spontaneous tilt in the synthesis of new magnetic structures including tilted superlattices and atomic chains, are discussed. Long-range magnetic order is observed in Dy-Y and Er-Y superlattices, and is explained in terms of the RKKY exchange mechanism. The primary differences between the magnetic behavior of superlattices and their constituent magnetic components are that ferromagnetic transitions at low temperature are suppressed. This change is caused by lattice "clamping" to the substrate, which modifies the available magnetoelastic energy and hence also the magnetic phase diagram.
Properties of Metal Silicides
Author: Karen Maex
Publisher: Institution of Electrical Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 358
Book Description
The properties of silicon alloyed with metals are presented here for silicides of both transition and rare earth metals.
Publisher: Institution of Electrical Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 358
Book Description
The properties of silicon alloyed with metals are presented here for silicides of both transition and rare earth metals.
Epitaxial Sm-Co Thin Films
Author:
Publisher: Cuvillier Verlag
ISBN: 3736921071
Category : Science
Languages : en
Pages : 118
Book Description
Publisher: Cuvillier Verlag
ISBN: 3736921071
Category : Science
Languages : en
Pages : 118
Book Description
Structure and Transport of Epitaxial Rare Earth Silicides
Author: Forrest H. Kaatz
Publisher:
ISBN:
Category :
Languages : en
Pages : 134
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 134
Book Description
Physics Briefs
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1058
Book Description
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1058
Book Description
INIS Atomindex
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1060
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1060
Book Description
Epitaxial Growth and Intrinsic Magnetic Properties of Magnetic Thin Films on Semiconductor Materials
Author: Cong Lu
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measuring Low Dimensional Schottky Barriers of Rare Earth Silicide-silicon Interfaces
Author: Andrew James Vick
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Epitaxial Growth and Some Magnetic Properties of Ferromagnetic Films
Author: M. Saiyid Uz Zafer
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description