TY - JOUR
T1 - Thermal and Magnetic-Field Stability of Holmium Single-Atom Magnets
AU - Natterer, Fabian Donat
AU - Donati, Fabio
AU - Patthey, François
AU - Brune, Harald
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/7/10
Y1 - 2018/7/10
N2 - We use spin-polarized scanning tunneling microscopy to demonstrate that Ho atoms on magnesium oxide exhibit a coercive field of more than 8 T and magnetic bistability for many minutes, both at 35 K. The first spontaneous magnetization reversal events are recorded at 45 K, for which the metastable state relaxes in an external field of 8 T. The transverse magnetic anisotropy energy is estimated from magnetic field and bias voltage dependent switching rates at 4.3 K. Our measurements constrain the possible ground state of Ho single-atom magnets to either Jz=7 or 8, both compatible with magnetic bistability at fields larger than 10 mT.
AB - We use spin-polarized scanning tunneling microscopy to demonstrate that Ho atoms on magnesium oxide exhibit a coercive field of more than 8 T and magnetic bistability for many minutes, both at 35 K. The first spontaneous magnetization reversal events are recorded at 45 K, for which the metastable state relaxes in an external field of 8 T. The transverse magnetic anisotropy energy is estimated from magnetic field and bias voltage dependent switching rates at 4.3 K. Our measurements constrain the possible ground state of Ho single-atom magnets to either Jz=7 or 8, both compatible with magnetic bistability at fields larger than 10 mT.
UR - http://www.scopus.com/inward/record.url?scp=85049933202&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.121.027201
DO - 10.1103/PhysRevLett.121.027201
M3 - Article
C2 - 30085712
AN - SCOPUS:85049933202
SN - 0031-9007
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 027201
ER -