Role of quantum well in Pd(111) thin film magnetism

Ho, Thi H.; Rhim, S. H.; Hong, Seung‐Tae

doi:10.1016/j.jmmm.2022.169891

Cited by 1 publication

(1 citation statement)

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“…This suggests that the measured spin polarization is related to strain. Strain, however, is related to Pd thin film ferromagnetism [43][44][45][46][82][83][84][85], as noted in the introduction. The expansive strain that appears to be associated to ferromagnetic Pd in prior work is about 1%-2% [45,84], while here the expansion of the Pd thin film lattice is 15% for the thinnest Pd films and reducing to 2% at Pd film thicknesses of 80 Å.…”

Section: The Correlation Between Strain and In-plane Pd Layer Surface...mentioning

confidence: 93%

The spin polarization of palladium on magneto-electric Cr₂O₃

Komesu

Echtenkamp

Binek

et al. 2023

J. Phys.: Condens. Matter

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While induced polarization of a palladium overlayer on antiferromagnetic and magneto-electric Cr2O3(0001) is possible because of the boundary polarization at the Cr2O3(0001), in the single domain state, the palladium (Pd) thin film appears to be ferromagnetic on its own, likely as a result of strain. In the conduction band, we find the experimental evidence of ferromagnetic spin polarized in Pd thin films on a Cr2O3(0001) single crystal, especially in the thin limit, Pd thickness of around 1-4 nm. Indeed there is significant spin polarization in 10 Å thick Pd films on Cr2O3(0001) at 310 K, i.e. above the Néel temperature of bulk Cr2O3. While Cr2O3(0001) has surface moments that tend to align along the surface normal, for Pd on Cr2O3, the spin polarization contains an in-plane component. Strain in the Pd adlayer on Cr2O3(0001) appears correlated to the spin polarization measured in spin polarized inverse photoemission spectroscopy. Further evidence for magnetization of Pd on Cr2O3 is provided by measurement of the exchange bias fields in Cr2O3/Pd(buffer)/[Co/Pd]n exchange bias systems. The magnitude of the exchange bias field is, over a wide temperature range, virtually unaffected by the Pd thickness variation between 1 and 2 nm.

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