title: An endohedral single-molecule magnet with long relaxation times: DySc2N@C80.
abstract: The magnetism of DySc(2)N@C(80) endofullerene was studied with X-ray magnetic circular dichroism (XMCD) and a magnetometer with a superconducting quantum interference device (SQUID) down to temperatures of 2 K and in fields up to 7 T. XMCD shows hysteresis of the 4f spin and orbital moment in Dy(III) ions. SQUID magnetometry indicates hysteresis below 6 K, while thermal and nonthermal relaxation is observed. Dilution of DySc(2)N@C(80) samples with C(60) increases the zero-field 4f electron relaxation time at 2 K to several hours.
authors.affiliation: Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
authors.forename: Rasmus
authors.initials: R
authors.lastname: Westerström
authors.forename: Jan
authors.initials: J
authors.lastname: Dreiser
authors.forename: Cinthia
authors.initials: C
authors.lastname: Piamonteze
authors.forename: Matthias
authors.initials: M
authors.lastname: Muntwiler
authors.forename: Stephen
authors.initials: S
authors.lastname: Weyeneth
authors.forename: Harald
authors.initials: H
authors.lastname: Brune
authors.forename: Stefano
authors.initials: S
authors.lastname: Rusponi
authors.forename: Frithjof
authors.initials: F
authors.lastname: Nolting
authors.forename: Alexey
authors.initials: A
authors.lastname: Popov
authors.forename: Shangfeng
authors.initials: S
authors.lastname: Yang
authors.forename: Lothar
authors.initials: L
authors.lastname: Dunsch
authors.forename: Thomas
authors.initials: T
authors.lastname: Greber