Electronic Properties of Inorganic and Organic Semiconductors and Their Application to National Security Needs

MRS Bulletin ◽  
2004 ◽  
Vol 29 (9) ◽  
pp. 647-652
Author(s):  
Darryl L. Smith
Keyword(s):  
Electronic Structure ◽  
National Security ◽  
Organic Semiconductors ◽  
Gamma Ray ◽  
National Laboratory ◽  
Research Society ◽  
Los Alamos National Laboratory ◽  
Inorganic Semiconductors ◽  
Materials Research ◽  
Structure Lead

AbstractThe following article is based on the plenary presentation given by Darryl L.Smith of Los Alamos National Laboratory on December 1, 2003, at the Materials Research Society Fall Meeting in Boston.The presentation contrasted the electronic structure of inorganic semiconductors with that of organic semiconductors, examined how the differences in electronic structure lead to complementary physical properties, and discussed applications of these materials—including infrared detectors and sources, gamma-ray detectors, and chemical/biological sensors—that are of interest to issues of national security.

Organic-Based Magnets: Opportunities in Photoinduced Magnetism, Spintronics, Fractal Magnetism, and Beyond

MRS Bulletin ◽  
2003 ◽  
Vol 28 (7) ◽  
pp. 492-499 ◽  
Author(s):  
Arthur J. Epstein
Keyword(s):  
Magnetic Properties ◽  
Organic Semiconductors ◽  
Spin Glasses ◽  
Molecular Design ◽  
Magnetic Ordering ◽  
Research Society ◽  
Spin Polarized ◽  
Materials Research ◽  
Photoinduced Magnetism ◽  
New Phenomena

AbstractThis article is based on a presentation on organic-based magnets given as part of Symposium X—Frontiers of Materials Research on December 4, 2002, at the 2002 Materials Research Society Fall Meeting in Boston. The advent of organic-based magnets opened the opportunity for tuning magnetic properties by molecular design and the discovery of new phenomena that rely on the internal structure of the molecules that make up these magnets. In the past 18 years, numerous classes of organic-based ferromagnets, ferrimagnets, and spin glasses (spins essentially frozen in place without long-range order) have been reported. These materials have magnetic ordering temperatures ranging from <1 K to above room temperature and demonstrate many of the magnetic properties associated with conventional magnets. This article concentrates on new phenomena that are unique to organic-based magnets. Three of these effects—“high-temperature” light-induced magnetism, spin-polarized magnetic organic semiconductors with the potential for spintronics, and the development of fractal magnetic order—are discussed to illustrate the richness of opportunity in organic-based magnets.

Up Close: Center for Materials Science at Los Alamos National Laboratory

MRS Bulletin ◽  
1987 ◽  
Vol 12 (6) ◽  
pp. 104-104
Author(s):  
Don M. Parkin
Keyword(s):  
Materials Science ◽  
Science And Technology ◽  
National Laboratory ◽  
Alamos National Laboratory ◽  
Los Alamos ◽  
Los Alamos National Laboratory ◽  
Core Group ◽  
Research Programs ◽  
Materials Research ◽  
Long Term Impact

Los Alamos National Laboratory (LANL) has extensive and diverse activities and programs in materials science and engineering. The Center for Materials Science (CMS) was established to promote scientific collaboration and scientific excellence in materials research and engineering throughout the Laboratory and with individuals and institutions outside the Laboratory. The Center's objective is to enhance the Laboratory's materials science and technology contributions to the nation's defense, energy, and scientific missions.Consistent with its main objective, Laboratory resources supply the principal funding for CMS programs. Additional funding for individual scientific research programs conducted by CMS members comes directly from outside sources.To carry out its responsibilities, CMS has accepted four demanding missions:1. Build a core group of qualified and established materials scientists and solid state physicists.2. Promote and support top-quality, interdisciplinary materials research programs at Los Alamos.3. Strengthen the interactions of materials scientists at Los Alamos with the external materials science community.4. Establish and maintain modern materials research facilities in a readily accessible, central location.The core group of CMS members has a broad charter to advance materials science and technology in directions expected to have long-term impact on LANL's mission. The acting director is Don M. Parkin. In addition to the director, six members presently constitute the CMS. James L. Smith heads an experimental effort in superconductivity.

Scientists Convene in San Diego

MRS Bulletin ◽  
1989 ◽  
Vol 14 (7) ◽  
pp. 54-61
Keyword(s):  
San Diego ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Leading Edge ◽  
The United States ◽  
Research Society ◽  
Scientific Meeting ◽  
Spring Meeting ◽  
Wide Range ◽  
Materials Research

More than 1,800 scientists from the United States and 33 other countries convened at the MRS Spring Meeting in San Diego, April 24-29,1989 to meet with their colleagues and discuss the latest research on a wide range of topics. According to Meeting Cochair Richard W. Siegel of Argonne National Laboratory, “It was a stimulating, broad-based, interdisciplinary scientific meeting of the high caliber that the materials research community has come to expect from the Materials Research Society.”Siegel, along with Cochairs Robin EC. Farrow of IBM's Almaden Research Center and Angelica M. Stacy of the University of California led a cadre of 54 volunteer symposium organizers to present an impressive array of leading-edge topics in 17 different symposia, including a late-news technology update on diamond films. Topics ranged from the fundamental condensed-matter physics and chemistry of small atomic clusters, high Tc superconductors, and the processing of a wide variety of optica], electronic, and ceramic materials to the consideration of problems and solutions regarding materials for the world's infrastructure.Complementing the wide range of scientific interests probed at the Spring Meeting were a three-day exhibit of the latest analytical and processing equipment, and a week-long series of 15 specialty, review, and survey short courses, many directly related to the symposium topics.

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