Low-temperature properties of single-crystal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">CrB</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>

Bauer, Andreas; Regnat, Alexander; Blum, Christian; Gottlieb-Schönmeyer, S.; Pedersen, Bjørn; Meven, Martin; Wurmehl, S.; Kuneš, J.; Pfleiderer, C.

doi:10.1103/physrevb.90.064414

Cited by 26 publications

(31 citation statements)

References 70 publications

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“…Single crystals of 11 B-enriched CrB 2 were synthesized using the laser floating zone technique to avoid strong neutron absorption of 10 B [20]. Figure 1(d) shows the magnetization curves of our sample which are consistent with previous studies [19,21]. Using five co-aligned single crystals with a total mass of 13 g and the overall mosaicity less than 1.5°, we carried out an INS experiment in the MAPS time-of-flight spectrometer at ISIS, UK [22,23].…”

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confidence: 80%

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Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2

Park

Kousaka

et al. 2020

Phys. Rev. Lett.

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Noncollinear magnetic order arises for various reasons in several magnetic systems and exhibits interesting spin dynamics. Despite its ubiquitous presence, little is known of how magnons, otherwise stable quasiparticles, decay in these systems, particularly in metallic magnets. Using inelastic neutron scattering, we examine the magnetic excitation spectra in a metallic noncollinear antiferromagnet CrB 2 , in which Cr atoms form a triangular lattice and display incommensurate magnetic order. Our data show intrinsic magnon damping and continuumlike excitations that cannot be explained by linear spin wave theory. The intrinsic magnon linewidth Γðq; E q Þ shows very unusual momentum dependence, which our analysis shows to originate from the combination of two-magnon decay and the Stoner continuum. By comparing the theoretical predictions with the experiments, we identify where in the momentum and energy space one of the two factors becomes more dominant. Our work constitutes a rare comprehensive study of the spin dynamics in metallic noncollinear antiferromagnets. It reveals, for the first time, definite experimental evidence of the higher-order effects in metallic antiferromagnets.

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confidence: 80%

“…Also, CrB 2 has a reduced ordered magnetic moment (0.5 μ B =f:u:), which is a characteristic feature of itinerant magnets. Finally, temperature dependence of resistivity [19] clearly demonstrates the metallicity of CrB 2 .…”

mentioning

confidence: 84%

Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2

Park

Kousaka

et al. 2020

Phys. Rev. Lett.

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“…Recently, a similar analogy of Eq. (1) has been used to analyze the resistivity of an itinerant antiferromagnet, CrB

_{2}

().…”

Section: Resistivitymentioning

confidence: 99%

Investigation of chiral phases near helical ordering temperature in MnSi

Samatham

Ganesan

2015

Phys. Status Solidi B

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Chiral modulation crossovers and phase transitions of MnSi in the vicinity of the long‐range magnetic ordering temperature are investigated. Notable anomalies in specific heat as a function of magnetic fields that directly correspond to the speculated chiral modulations in the precursor region are observed. The magneto‐thermal (H–T) phase diagram reveals the existence of repulsive, attractive, and confined skyrmion phases. Resistivity analysis suggests strong electron–magnon coupling as well as the possibility of strong electron correlations in MnSi supported by the Kadowaki–Woods ratio (A/γ2), which is close to that of moderate heavy Fermion metals.

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“…CrB 2 has been studied comparably well, thereby establishing this material as an itinerant antiferromagnet par excellence with a Néel temperature of 88 K [65][66][67]. Hallmark properties include, good metallic conductivity [68,69], small ordered moments of 0.5 µ B /Cr [70] contrasted by large fluctuating moments of 2 µ B /Cr [71,69,72], and an exceptional stability with respect to magnetic fields, all arising in the presence of moderate electronic correlations and sizable geometric frustration [73,74,67].…”

Section: Diboridesmentioning

confidence: 98%

Compositional Studies of Metals with Complex Order by means of the Optical Floating-Zone Technique

Bauer,

Benka,

Neubauer

et al. 2021

Preprint

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The availability of large high-quality single crystals is an important prerequisite for many studies in solid-state research. The optical floating-zone technique is an elegant method to grow such crystals, offering potential to prepare samples that may be hardly accessible with other techniques. As elaborated in this report, examples include single crystals with intentional compositional gradients, deliberate off-stoichiometry, or complex metallurgy. For the cubic chiral magnets Mn 1−x Fe x Si and Fe 1−x Co x Si, we prepared single crystals in which the composition was varied during growth from x = 0 − 0.15 and from x = 0.1 − 0.3, respectively. Such samples allowed us to efficiently study the evolution of the magnetic properties as a function of composition, as demonstrated by means of neutron scattering. For the archetypical chiral magnet MnSi and the itinerant antiferromagnet CrB 2 , we grew single crystals with varying initial manganese (0.99 to 1.04) and boron (1.95 to 2.1) content. Measurements of the low-temperature properties addressed the correlation between magnetic transition temperature and sample quality. Furthermore, we prepared single crystals of the diborides ErB 2 , MnB 2 , and VB 2 . In addition to high vapor pressures, these materials suffer from peritectic formation, potential decomposition, and high melting temperature, respectively.Copyright line will be provided by the publisher high vapor pressure. In addition, due to the direct optical access to the molten zone, the process parameters may be optimized already during growth.We have set up a preparation chain that is focused on growth of large high-quality single crystals of intermetallic compounds under ultra-high vacuum compatible conditions. Details on the technical aspects can be found in Refs. [1][2][3]. Core parts are three image furnaces that allow us to address a wide range of materials. The furnaces are a four-mirror image furnace from Crystal Systems

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Low-temperature properties of single-crystalCrB2

Cited by 26 publications

References 70 publications

Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2

Momentum-Dependent Magnon Lifetime in the Metallic Noncollinear Triangular Antiferromagnet CrB2

Investigation of chiral phases near helical ordering temperature in MnSi

Compositional Studies of Metals with Complex Order by means of the Optical Floating-Zone Technique

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