X-ray magnetic circular dichroism study of Dy-doped Bi2Te3 topological insulator thin films by Figueroa, A, Baker, A, Harrison, S, Kummer, K, van der Laan, G, Hesjedal, T

“…Here, we present a surface-sensitive x-ray magnetic circular dichroism (XMCD) study of an in situ cleaved lm in the cleanest possible environment. …”

Magnetic ordering in Ho-doped Bi2Te3 topological insulator thin films by Figueroa, A, Harrison, S, Collins-McIntyre, L, van der Laan, G, Hesjedal, T

“…Analysis of the polarized x-ray absorption spectra at the Ho M5 absorption edge gives an effective 4f magnetic moment which is ~45% of the Hund's rule ground state value. X-ray magnetic circular dichroism (XMCD) shows no significant anisotropy, which suggests that the reduced spin moment is not due to the crystal field effects, but rather the presence of non-magnetic or antiferromagnetic Ho sites. …”

Magnetic proximity-coupling to Cr-doped Sb₂Te₃ thin films by Duffy, L, Figueroa, A, Gladczuk, L, Steinke, N, Kummer, K, van der Laan, G, Hesjedal, T

“…Using soft x-ray absorption spectroscopy we determined the chemical and magnetic properties of the magnetic topological insulator (MTI) Cr:Sb2Te3. X-ray magnetic circular dichroism (XMCD) at the Cr L2,3, Te M4,5, and Sb M4,5 edges shows that the Te 5p moment is aligned antiparallel to both the Cr 3d and Sb 5p moments, which is characteristic for carrier-mediated ferromagnetic coupling. …”

Magnetic Cr doping of Bi2Se3: Evidence for divalent Cr from x-ray spectroscopy by Figueroa, A, van der Laan, G, Collins-McIntyre, L, Zhang, S, Baker, A, Harrison, SE, Schoenherr, P, Cibin, G, Hesjedal, T

“…Comparison of the Cr L2,3 x-ray magnetic circular dichroism at T=5 K with multiplet calculations gives a spin moment of 3.64 μB/Crbulk, which is close to the saturation moment for Cr2+ d4. …”

Anisotropic magnetic switching along hard [110]-type axes in Er-doped DyFe 2 /YFe 2 thin films by Stenning, G, Bowden, G, van der Laan, G, Figueroa, A, Bencok, P, Steadman, P, Hesjedal, T

“…In particular, the out-of-plane [110] Er results show the existence of a new magnetic exchange spring state, which would be very difficult to identify without the aid of element-specific technique of X-ray magnetic circular dichroism (XMCD).…”