skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Design of the First Ferromagnetic Piezoelectric (FINAL TECHNICAL REPORT)

Abstract

Abstract During the course of the grant we made the following scientific advances: • We developed a thorough understanding of piezoelectricity in antiferromagnetic wurtzite structure MnO. • We explained the absence of ferromagnetism in high quality samples of transition-metal-doped ZnO, and proposed a scheme for obtaining robust ferromagnetism in ZnO-based systems. • We demonstrated that the MgO-ZnO-CdO system is a promising candidate for the production of polarization field-effect transistors.

Authors:
 [1]
  1. (Hill), Nicola
Publication Date:
Research Org.:
The Regents of the University of California, Santa Barbara
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
901634
Report Number(s):
02ER45986F
TRN: US201006%%619
DOE Contract Number:
FG02-02ER45986
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DESIGN; FERROMAGNETISM; PIEZOELECTRICITY; POLARIZATION; PRODUCTION; TRANSISTORS; piezoelectricity, ZnO, ferromagnetics

Citation Formats

Spaldin. Design of the First Ferromagnetic Piezoelectric (FINAL TECHNICAL REPORT). United States: N. p., 2007. Web. doi:10.2172/901634.
Spaldin. Design of the First Ferromagnetic Piezoelectric (FINAL TECHNICAL REPORT). United States. doi:10.2172/901634.
Spaldin. Tue . "Design of the First Ferromagnetic Piezoelectric (FINAL TECHNICAL REPORT)". United States. doi:10.2172/901634. https://www.osti.gov/servlets/purl/901634.
@article{osti_901634,
title = {Design of the First Ferromagnetic Piezoelectric (FINAL TECHNICAL REPORT)},
author = {Spaldin},
abstractNote = {Abstract During the course of the grant we made the following scientific advances: • We developed a thorough understanding of piezoelectricity in antiferromagnetic wurtzite structure MnO. • We explained the absence of ferromagnetism in high quality samples of transition-metal-doped ZnO, and proposed a scheme for obtaining robust ferromagnetism in ZnO-based systems. • We demonstrated that the MgO-ZnO-CdO system is a promising candidate for the production of polarization field-effect transistors.},
doi = {10.2172/901634},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 03 00:00:00 EDT 2007},
month = {Tue Apr 03 00:00:00 EDT 2007}
}

Technical Report:

Save / Share:
  • Spin-polarized photoelectron diffraction (SPPD) has been used previously by the authors group to study two antiferromagnetic surfaces (KMnF{sub 3} (011) and MnO(001)) - these measurements provided evidence of a surface and/or short-range-order magnetic transition significantly above the bulk transition temperature. The authors here report the first use of SPPD to study the order-disorder transitions on a ferromagnetic surface: Gd(0001). Prior work on Gd(0001) suggests that it is unusual in having a surface transition temperature that is 20-60 K above the bulk transition temperature, but there is still not total agreement on the existence of this effect and its origins. Themore » authors have thus used the multiplet-split Gd 4s and Gd 5s photoelectron spectra as sources of spin-polarized photoelectrons to study this magnetic transition.« less
  • The main objective of the pilot test facility (PTF) is to validate mathematical models for domestic solar space heating systems. The design and operation of the two solar heating systems currently incorporated into the United Kingdom PTF are detailed.
  • The results of phase 1 of the Irish solar pilot test facility are presented. The work described comprises: (a) the construction of a pilot test facility consisting of two systems, a standard reference system built to the same specification in each of the participating countries, and (b) a national sub-system designed independently by each participant. These two systems, described respectively as Solar System One and Solar System Two, are discussed in relation to the mechanical, measurement and control principles governing them, the allied construction and other problems. The results of preliminary trials on Solar System One are given, the trialsmore » being composed of tests performed on the various circuits of the system, and hourly data on magnetic tape sent to the co-ordinator for a specific period.« less
  • Attention to driver acceptance and performance issues during system design will be key to the success of the Automated Highway System (AHS). A first step in the process defining driver roles and driver-system interface requirements for AHS is the definition of system visions and operational scenarios. These scenarios then become the basis for first identifying driver functions and information requirements, and, later, designing the driver`s interface to the AHS. In addition, the scenarios provide a framework within which variables that potentially impact the driver can be explored systematically. Seven AHS operational scenarios, each describing a different AHS vision, were definedmore » by varying three system dimensions with special significance for the driver. These three dimensions are: (1) the degree to which automated and manual traffic is separated, (2) the rules for vehicle following and spacing, and (3) the level of automation in traffic flow control. The seven scenarios vary in the complexity of the automated and manual driving maneuvers required, the physical space allowed for maneuvers, and the nature of the resulting demands placed on the driver. Each scenario describes the physical configuration of the system, operational events from entry to exist, and high-level driver functions.« less
  • Southwest Research Institute (SwRI) has developed the natural convection supercritical fluids (SCF) cleaner as a potential substitute for 1,1,1-trichloroethane and Freon 113. This cleaner offers the potential for reduced capital investment, lower, operating costs, and improved maintainability and reliability over the conventional SCF devices principally by eliminating the circulating SCF and the compressor requirement. To demonstrate the natural convection technology on a production scale and to provide a USAF with a useful tool for detailed assessments, this project`s objective was to construct a preproduction device which could clean 70% of all parts handled at WPAFB (Wright-Patterson Air Force Base) Aircraftmore » Modification Directorate. A 10-inch diameter cleaning chamber was specified to handle parts weighing up to 70 pounds. The SwRI prototype was used for experimental studies for process design purposes and as a guide for scale-up.« less