Itinerant helimagnetic single-crystalline MnSi nanowires.
We report the synthesis of free-standing MnSi nanowires via a vapor transport method with no catalyst and measurements of their electrical and magnetic properties for the first time. The single-crystalline MnSi nanowire ensemble with a simple cubic (B20) crystal structure shows itinerant helimagnetic properties with a T(c) of about 30 K. A single MnSi nanowire device was fabricated by a new method using photolithography and a nanomanipulator that produces good ohmic contacts. The single-nanowire device measurements provide large (20%) negative magnetoresistance and very low electrical resistivity of 544 microOmegacm for the MnSi nanowire.
Seo
Kwanyong
K
Department of Chemistry, KAIST, Daejeon 305-701, Korea.
Yoon
Hana
H
Ryu
Seong-Wan
SW
Lee
Sunghun
S
Jo
Younghun
Y
Jung
Myung-Hwa
MH
Kim
Jinhee
J
Choi
Yang-Kyu
YK
Kim
Bongsoo
B