title: Room-temperature ferromagnetism in ZnO-encapsulated 1.9 nm FePt3 nanoparticle-composite thin films with giant interfacial anisotropy.
abstract: As synthesized 1.9-nm FePt3 nanoparticles are superparamagnetic at room temperature. Coating those nanoparticles with ZnO renders them permanently ferromagnetic with coercivity field of 650 Oe at room temperature. First-principles calculations indicate that giant interfacial anisotropy, induced by the strong spin-orbit interaction of enhanced orbit momentum of Fe, overcomes the superparamagnetic limit, leading to exceptional room-temperature permanent ferromagnetism. The findings are important for the understanding of the origin of permanent ferromagnetism at ultrasmall size and critical for ultrahigh density recording and information processing.
authors: Data Storage Institute, Agency for Science Technology and Research, Singapore 117608, Singapore.
authors: Lei
authors: L
authors: Shen
authors: Tiejun
authors: T
authors: Zhou
authors: Rui Qi
authors: RQ
authors: Wee
authors: Kiat Min
authors: KM
authors: Cher
authors: Hnin Yu Yu
authors: HY
authors: Ko
authors: Rui
authors: R
authors: Niu
authors: Hao
authors: H
authors: Gong
authors: Zhimin
authors: Z
authors: Yuan
authors: Bo
authors: B
authors: Liu
authors: Yuan Ping
authors: YP
authors: Feng