세미나 개최 안내(강자성 형상기억합금 관련)

[라이트(이상열)]

한국기계연구원 재료기술연구소 비철재료그룹에서 다음과 같이
전문가를 모시고 강자성 형상기억합금과 관련한 세미나를 개최하오니
관심있는 분의 많은 참여 바랍니다.

----------------아   래---------------------------

1. 제목 : Influence of structural disorder on the various physical properties of Heusler alloy films

2. 발표자(소속) : 선문대학교 물리학부 부교수 김기원

3. 발표 장소 : 한국기계연구원 재료기술연구소 연구4동 세미나실

4. 발표 시간 : 2005. 1. 28(금) 오후: 4-5시

문의 : 이정무(055-280-3335)

-- 초록---
In this study, Heusler alloy (HA) films with noticeably different
structural orders were fabricated, and the influence of structural
disorder on the magnetic, the optical, and the magneto-optical (MO)
properties has been investigated. Bulk HA was prepared by arc
melting, and the films were deposited by flash evaporation onto glass
substrates at several substrate temperatures from 150 to 730 K. The
structural characterization was performed by x-ray diffraction and
transmission electron microscope. The temperature dependence of
magnetic properties was investigated with a superconducting quantum
interference device. The optical properties were obtained using a
spectroscopic ellipsometer and the magneto-optical (MO) properties
were understood by measuring the equatorial Kerr effect. While the
films deposited at high temperature show a well-ordered L21
structure, deposition at 150 K results in the formation of a
nanocrystalline or an amorphous microstructure. It was found that the
structural disorder in the films leads to the loss of ferromagnetic
order. It was also found that the optical and MO properties were
strongly depend on the film structures.