Ultrafast giant magnetic cooling effect in ferromagnetic Co/Ptmultilayers

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486650.do
DOI
10.1038/s41467-017-00816-w
Title
Ultrafast giant magnetic cooling effect in ferromagnetic Co/Ptmultilayers
Description
This study was supported by Korea Research Foundation (NRF) grant No.2015R1D1A3A01020686 and a KBSI Grant D37614. This research has beensupported in part by Global Research Laboratory Program [Grant No2009-00439] and by Max Planck POSTECH/KOREA Research Initiative Program[Grant No 2016K1A4A4A01922028] through the National Research Foundationof Korea (NRF) funded by Ministry of Science, ICT & Future Planning
abstract
The magnetic cooling effect originates from a large change in entropy by the forced magnetization alignment, which has long been considered to be utilized as an alternative environment-friendly cooling technology compared to conventional refrigeration. However, an ultimate timescale of the magnetic cooling effect has never been studied yet. Here, we report that a giant magnetic cooling (up to 200 K) phenomenon exists in the Co/Pt nanomultilayers on a femtosecond timescale during the photoinduced demagnetization and remagnetization, where the disordered spins are more rapidly aligned, and thus magnetically cooled, by the external magnetic field via the lattice-spin interaction in the multilayer system. These findings were obtained by the extensive analysis of time-resolved magneto-optical responses with systematic variation of laser fluence as well as external field strength and direction. Ultrafast giant magnetic cooling observed in the present study can enable a new avenue to the realization of ultrafast magnetic devices.
provenance
Made available in Cube on 2018-09-28T16:13:16Z (GMT). No. of bitstreams: 0
language
English
author
Shim, Je-Ho
Syed, Akbar Ali
Kim, Chul-Hoon
Lee, Kyung Min
Park, Seung-Young
Jeong, Jong-Ryul
Kim, Dong-Hyun
Kim, Dong Eon
accessioned
2018-09-28T16:13:16Z
available
2018-09-28T16:13:16Z
issued
2017
citation
NATURE COMMUNICATIONS(8)
issn
2041-1723
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486650.do
Funder
과학기술정보통신부
Funding Program
한국기초과학지원연구원연구운영비지원
Project ID
1711063457
Jurisdiction
Rep.of Korea
Project Name
Research and Development of Scientific Instrument
rights
openAccess
type
article


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