title: Quenching of giant hysteresis effects in La(1-z)Y(z)Hx switchable mirrors
abstract: The giant intrinsic hysteresis as a function of hydrogen concentration x in the optical and electrical properties of the archetypal switchable mirror YHx is eliminated by alloying Y with the chemically similar La. The La(1-z)Y(z)Hx films with z</=0.67 are essentially hysteresis-free. The origin of the large hysteresis of alloys with z>/=0.86 is the large uniaxial lattice expansion that accompanies their fcc to hexagonal phase transition in combination with lateral clamping.
authors.affiliation: Faculty of Sciences, Division of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.lastname: van Gogh AT
authors.initials: DG
authors.lastname: Nagengast
authors.initials: ES
authors.lastname: Kooij
authors.initials: NJ
authors.lastname: Koeman
authors.initials: R
authors.lastname: Griessen