[Apr. 24] 토토 분석 Molecular Sci. / IBS Joint Seminar An
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제목: 신소재공학과 엄창범 석학교수 특별세미나 안내<?xxml:namespace prefix=o ns=urn:schemas-microsoft-com:office:office /<?xml:namespace prefix=O /
■ 일시: 2014. 4.15(화), 15:30 ~ 16:30
■ 장소: 국제관
1층 대회의실
■ 연사: 엄창범 석학교수(University of
Wisconsin-Madison)
■ 연제: Magnetoelectric Control in Monodomain
MultiferroicThin Film Heterostructures
■Abstract
The
coupling between ferroelectric and ferromagnetic order parametersin multiferroic thin filmsis a fa토토 커뮤니티 순위nating prospect for fundamental 토토 커뮤니티 순위entific research and
potential multifunctional device applications. Among many multiferroic
materials, BiFeO3has potential for the development of novel
spintronic devices as its unrivaled room-temperature multiferroic properties can
be exploited in exchange-coupled magnetic tunnel junctions (MTJs). Until now,
the fundamental problem in implementing these devices has been that exchange
interactions between BiFeO3and a ferromagnetic overlayer have been
observed only in the presence ofdomain walls. We now have new evidence
of anintrinsicexchange interaction betweenmonodomainBiFeO3and a cobalt ferromagnetic overlayer that is not mediated
by domain walls. We have developed a quantitative understanding of the
magnetoelectric properties ofmonodomainBiFeO3films using
advanced synchrotron techniques (XMCD and XMLD). Such an approach would provide
the basis for a deterministic and scalable device design that has been difficult
in domain-wall-based approaches due to the inherent difficulty in precisely
controlling domain wall formation and movement.
신소재공학과
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