Electronic band structure and Fermi surface of ferromagnetic Tb: Experiment and theory

Döbrich, K. M.; Bihlmayer, Gustav; Starke, K.; Prieto, J. E.; Koh, HyeJung; Rotenberg, Eli; Blügel, Stefan; Kaindl, G.

doi:10.1103/physrevb.76.035123

Cited by 25 publications

(36 citation statements)

References 56 publications

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“…In contrast to the magnetization and neutron experiments, where polycrystalline bulk samples were studied, we used single-crystalline 10-nm-thick Tb metal films in the ARPES measurements, prepared in situ on a W(110) single crystal. It has been shown in previous ARPES experiments 23 that films of this thickness show a bulk electronic valence-band structure. Note that at film thicknesses > 5 nm, the electronic structure as seen with ARPES does not depend on the film thickness; because of the surface sensitivity of this technique only the first few top layers contribute to the measured signal.…”

Section: Methodsmentioning

confidence: 59%

Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal

et al. 2011

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We report on the results of grain-size and temperature-dependent magnetization, specific-heat, and neutron-scattering experiments on the heavy rare-earth metals terbium and holmium, with particular emphasis on the temperature regions where the helical antiferromagnetic phases exist. In contrast to Ho, we find that the helical structure in Tb is relative strongly affected by microstructural disorder, specifically, it can no longer be detected for the smallest studied grain size of D = 18 nm. Moreover, in coarse-grained Tb a helical structure persists even in the ferromagnetic regime, down to about T = 215 K, in agreement with angle-resolved photoelectron spectroscopy (ARPES) data, which reveal a nesting feature of the bulk Fermi surface at the L point of the Brillouin zone at T = 210 K. As samples for the ARPES measurements, we used 10-nm-thick single-crystalline Tb films that show a bulk electronic valance-band structure. Thus, our ARPES measurements are used to discuss temperature-induced effects observed in the coarse-grained samples.

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Section: Methodsmentioning

confidence: 59%

Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal

et al. 2011

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“…To model the properties of TbCo we have used the following material parameters: damping constant λ = 0.05 for both materials, and magnetic moments μ Co = 1.61μ B [33] and μ Tb = 9.34μ B [34]. The selected magnetic moment values for our simulations are the corresponding bulk values for Co and Tb.…”

Section: Modelmentioning

confidence: 99%

Conditions for thermally induced all-optical switching in ferrimagnetic alloys: Modeling of TbCo

et al. 2017

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“…58 To establish if the Kondo resonance plays a role in Tb's volume collapse, we carried out high-pressure resistivity studies on Y(0.5 at.% Tb). The T c (P) is plotted in Fig.…”

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Different routes to pressure-induced volume collapse transitions in gadolinium and terbium metals

et al. 2013

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The sudden decrease in molar volume exhibited by most lanthanides under high pressure is often attributed to changes in the degree of localization of their 4f -electrons. We give evidence, based on electrical resistivity measurements of dilute Y(Gd) and Y(Tb) alloys to 120 GPa, that the volume collapse transitions in Gd and Tb metals have different origins, despite their being neighbors in the periodic table. Remarkably, the change under pressure in the magnetic state of isolated Pr or Tb impurity ions in the nonmagnetic Y host appears to closely mirror corresponding changes in pure Pr or Tb metals. The collapse in Tb appears to be driven by an enhanced negative exchange interaction between 4f and conduction electrons under pressure (Kondo resonance) which, in the case of Y(Tb), dramatically alters the superconducting properties of the Y host, much like previously found for Y(Pr). In Gd our resistivity measurements suggest that a Kondo resonance is not the main driver for its volume collapse. X-ray absorption and emission spectroscopies clearly show that 4f local moments remain largely intact across both volume collapse transitions ruling out 4f band formation (delocalization) and valence transition models as possible drivers. The results highlight the richness of behavior behind the volume collapse transition in lanthanides and demonstrate the stability of the 4f level against band formation to extreme pressure.

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Electronic band structure and Fermi surface of ferromagnetic Tb: Experiment and theory

Cited by 25 publications

References 56 publications

Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal

Influence of crystallite size and temperature on the antiferromagnetic helices of terbium and holmium metal

Conditions for thermally induced all-optical switching in ferrimagnetic alloys: Modeling of TbCo

Different routes to pressure-induced volume collapse transitions in gadolinium and terbium metals

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