This dissertation seeks to study some polar magnets, especially hybrid improper ferroelectricity (HIF), one promising candidate to realize room{temperature multiferroics. In order to realize the designed properties, high-quality single crystals are required. First, we introduce the concept of hybrid improper ferroelectricity and discuss some intriguing domain features in the non-magnetic HIF, Sr-doped Ca3Ti2O7. Second, we present the detailed study of Ca3Mn2O7, the prototypic magnetic HIF. The discovery of interrelation between the domain structures and polarization switching is unprecedented. Finally, we pick up Fe2Mo3O8 from the list of polar magnets and unveil the hidden ferrimagnetism and giant magnetoelectric effect with a record high magnetoelectric coefficient.
Subject (authority = RUETD)
Topic
Physics and Astronomy
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_8020
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xvi, 70 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Ferromagnetic materials
Subject (authority = ETD-LCSH)
Topic
Magnets
Note (type = statement of responsibility)
by Bin Gao
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.