Quenching of giant hysteresis effects in La1-zYzHx switchable mirrors

Authors
van Gogh, ATM Nagengast, DG Kooij, ES Koeman, NJ Griessen, R
Citation
Atm. Van Gogh et al., Quenching of giant hysteresis effects in La1-zYzHx switchable mirrors, PHYS REV L, 85(10), 2000, pp. 2156-2159
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
10
Year of publication
2000
Pages
2156 - 2159
Database
ISI
SICI code
0031-9007(20000904)85:10<2156:QOGHEI>2.0.ZU;2-O
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 La1-zYz Hx films with z less than or equal to 0.67 are essentially hysteresis-free. The origin of the large hysteresis of alloys with z greater than or equal to 0.86 is the large uniaxial lattice expansion that accompanies their fee to hexagonal phase transition in combination with lateral clamping.