Field-induced magnetic phase transitions in a GdSi single crystal

Tung, Le Duc; Lees, Martin R.; Balakrishnan, Ganesh; Paul, D. Mc K.; Schobinger‐Papamantellos, P.; Tegus, O.; Brommer, P.E.; Buschow, K.H.J.

doi:10.1103/physrevb.71.144410

Cited by 13 publications

(17 citation statements)

References 18 publications

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“…The broad temperature evolution of the magnetic susceptibility of GdSi (Fig. 1B, Inset) is consistent with what has been previously reported in the literature (24). Here, we focus on the detailed region around T N (Fig.…”

Section: Resultssupporting

confidence: 75%

“…For CeSi, neutron powder diffraction results (34) established an incommensurate antiferromagnetic ground state close to (0, 0.5, 1/16) that is similar to what we found for GdSi. The local moment varies vastly from Ce (1.67 μ B ) (34) to Gd (8.4 μ B ) (24), yet the conduction bands are similar, with 5d 1 6s 2 states from either Ce or Gd, and s 2 p 2 states from either Si or Ge. We therefore suggest that the RKKY interaction between local moments is unlikely to be solely responsible for antiferromagnetic states with such similar wave vectors.…”

Section: Discussionmentioning

confidence: 99%

“…1A), which is antiferromagnetic below 55 K (23,24). Our X-ray measurements indicate that GdSi possesses an incommensurate spin structure in the ground state, involving both large local moments and itinerant electron spins.…”

mentioning

confidence: 90%

“…GdSi single crystals ∼4 mm in diameter and ∼70 mm in length were grown under a purified Ar atmosphere by the floating zone technique (24). Diffraction patterns collected on pulverized single crystals at 300 K confirmed that GdSi crystals are single phase.…”

Section: Methodsmentioning

confidence: 99%

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Incommensurate antiferromagnetism in a pure spin system via cooperative organization of local and itinerant moments

Feng

Wang

Silevitch

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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Materials with strong correlations are prone to spin and charge instabilities, driven by Coulomb, magnetic, and lattice interactions. In materials that have significant localized and itinerant spins, it is not obvious which will induce order. We combine electrical transport, X-ray magnetic diffraction, and photoemission studies with band structure calculations to characterize successive antiferromagnetic transitions in GdSi. GdSi has both sizable local moments and a partially nested Fermi surface, without confounding contributions from orbital effects. We identify a route to incommensurate order where neither type of moment dominates, but is rooted in cooperative feedback between them. The nested Fermi surface of the itinerant electrons induces strong interactions between local moments at the nesting vector, whereas the ordered local moments in turn provide the necessary coupling for a spindensity wave to form among the itinerant electrons. This mechanism echoes the cooperative interactions between electrons and ions in charge-density-wave materials, and should be germane across a spectrum of transition-metal and rare-earth intermetallic compounds.itinerant magnetism | RKKY interaction | asymmetric line shape I ncommensurate density waves emerge in a wide variety of correlated electron systems. They are a common aspect in cuprate superconductors (1, 2), itinerant transition-metal magnets (3, 4), and rare-earth compounds (5-7), as well as low-dimensional charge-ordered materials (8, 9) and perovskite manganites (10, 11). In contrast with commensurate density waves, the incommensurate states are often electronically soft (11), and many spin and charge orders in metals are continuously tunable (9, 12). Furthermore, the incommensurate structures are often only weakly coupled to other degrees of freedom in the underlying lattice, giving rise to the rare possibility of direct theoretical modeling of a variety of experimentally accessible material systems, spanning from functional materials of technological importance (10, 11) to fundamental topics of emergent states in quantum critical phenomena (9, 12).Spin states with long-range incommensurate magnetic order may be stabilized by itinerant electrons through two distinct mechanisms. If the Fermi surface has well-nested regions, the itinerant electrons themselves typically become unstable toward the formation of a spin-density wave (SDW) (13). A prominent example of this class of materials is elemental chromium (4,13,14). Alternatively, in the presence of local magnetic moments, the itinerant electrons may form screening clouds which mediate magnetic interactions between the local moments and cause them to order through the Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interaction (5, 15).To form a nesting-driven SDW or charge-density wave (CDW) (13), it is necessary to have a nonzero coupling between itinerant electron states on opposing portions of the nested Fermi surface. In the presence of a perfectly nested Fermi surface, the required coupling strength may be inf...

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Section: Resultssupporting

confidence: 75%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Incommensurate antiferromagnetism in a pure spin system via cooperative organization of local and itinerant moments

Feng

Wang

Silevitch

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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“…The magnetisation at low field shows anisotropic behaviour due to the interplay between the localised 4f -spins and the conduction electrons. 13 The magnetisation along the c-axis merges with that measured along b at about 3 T. Note, that this small anomaly is clearly visible in the magnetostriction curve measured by FBG. At higher field the magnetisation becomes isotropic and, after a spinflop process, reaches saturation through a first-order-like transition at 20 T. Both processes are clearly visible in the striction curve.…”

Section: Resultsmentioning

confidence: 70%

High resolution magnetostriction measurements in pulsed magnetic fields using fiber Bragg gratings

Daou

Weickert

Nicklas

et al. 2010

Review of Scientific Instruments

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We report on a new high resolution apparatus for measuring magnetostriction suitable for use at cryogenic temperatures in pulsed high magnetic fields which we have developed at the Hochfeld-Magnetlabor Dresden. Optical fibre strain gauges based on Fibre Bragg Gratings are used to measure the strain in small (∼ 1 mm) samples. We describe the implementation of a fast measurement system capable of resolving strains in the order of 10 −7 with a full bandwidth of 47 kHz, and demonstrate its use on single crystal samples of GdSb and GdSi.

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Structural defects and magnetic properties of gadolinium silicide nanoparticles synthesized by laser ablation technique in liquid

Tarasenka

Butsen

Pankov

et al. 2013

Physica Status Solidi (b)

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Magnetic nanoscale compounds and alloys of gadolinium are promising materials for technological and medical applications. In this paper the influence of structural defects on the properties of the binary GdSi nanopowders formed in laser ablation and post‐irradiation processes have been investigated. To obtain compound GdSi nanoparticles (NPs) we used laser ablation of a combined target consisting of Gd and Si plates tightly pressed to each other with focusing a laser beam onto the gadolinium–silicon interface. The crystalline structure, phase composition of the NPs formed were examined by SEM and X‐ray diffraction (XRD). Magnetic measurements showed that the resulting NPs did not exhibit hysteresis at low temperature (6 K), which is typical to nanosized magnetic materials demonstrating superparamagnetic behavior. Magnetization increased after laser processing of the samples due to ordering in the grain structure and in the magnetic moments at the surface. magnified image

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Field-induced magnetic phase transitions in a GdSi single crystal

Cited by 13 publications

References 18 publications

Incommensurate antiferromagnetism in a pure spin system via cooperative organization of local and itinerant moments

Incommensurate antiferromagnetism in a pure spin system via cooperative organization of local and itinerant moments

High resolution magnetostriction measurements in pulsed magnetic fields using fiber Bragg gratings

Structural defects and magnetic properties of gadolinium silicide nanoparticles synthesized by laser ablation technique in liquid

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