Files in this item

FilesDescriptionFormat

application/pdf

application/pdf1998_ritley.pdf (7MB)Restricted to U of Illinois
1998_ritleyPDF

Description

Title:Growth and magnetoelastic behavior of b-axis-oriented dysprosium
Author(s):Ritley, Kenneth Allan
Doctoral Committee Chair(s):Flynn, C.P.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):beta-axis
growth behavior
magnetoelastic behavior
rare earth metals
thin films
superlattices
Abstract:The rare earth metals have the largest known magnetostrictions, so that their magnetic properties and structural properties are strongly coupled. This coupling is ideally suited for investigation with thin films, in which single crystal films of high quality can be prepared on substrates which cause their lattice parameters to differ from bulk values (strain) and which constrain the strictions which may occur (clamping). The present research describes a new MBE growth procedure to grow single crystal thin films and superlattices of rare earths with the hcp (llOO) b-axis normal to the growth plane. To explore the role of strain, clamping and symmetry-breaking in modifying the magnetic ordering temperatures, ultrathin films of strained Dy have been prepared between YxLu1-x alloy buffer layers, so that strain can be tuned from compressive (x=O) to tensile (x=l) and chosen values in between. The magnetic ordering temperatures, critical fields, and magnetization behavior vary systematically with strain. This behavior is interpreted in terms of fundamental magnetoelastic interactions and shape anisotropy.
Issue Date:1998
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/30850
Other Identifier(s):4128643
Rights Information:©Ritley 1998
Date Available in IDEALS:2012-05-15


This item appears in the following Collection(s)

Item Statistics