Anomalous transport in half-metallic ferromagnetic CrO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>

Anwar, M. S.; Aarts, J.

doi:10.1103/physrevb.88.085123

Cited by 33 publications

(16 citation statements)

References 34 publications

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“…4(b)) is observed at all the temperatures only for the [010] crystallographic orientation (supplementary information Fig.4). Similar anisotropic behavior in MR has been observed in the Pt/Co/Pt films 36 , CrO2 thin films 37 and MnSi nanowires 38 where it is related to the chiral magnetic structure present in these systems. The chiral magnetic structure lacks inversion symmetry and has a strong spin-orbit coupling which is mainly induced by the DM interaction.…”

Section: Resultssupporting

confidence: 71%

Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

Banik

Das

Bendounan

et al. 2017

Sci Rep

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One of the main challenges in the field of spintronics is to manipulate the spin structures by electric and spin currents. In this context the materials with Rashba spin-orbit (SO) coupling 1 have gained a huge amount of interest due to their use in the Spintronics technology 2,3 . Rashba effect in the non-magnetic systems has been extensively studied 4-7 but there are very few reports on the magnetic metallic systems showing the Rashba effect [8][9][10] . In ferromagnetic (FM) materials with the SO splitting the magnetization reversal gives rise to Rashba effect which can be used for the giant magnetoresistance devices and spin transfer torque device applications 9,10 . Antiferromagnetic (AFM) materials are the hidden magnets and the magnetism in these systems is difficult to probe experimentally. The magnetization reversal in the AFM systems will not make any change because of zero net magnetic moment. In such a case, the rotation of the spins will lead to the change in the resistance and has important technological applications 11,12 . The anisotropic magnetoresistance in these AFM systems is linked to the SO interaction. Hence, the AFM systems which have significant anisotropy can be the promising candidates for the AFM spintronic devices 13 .

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Section: Resultssupporting

confidence: 71%

Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

Banik

Das

Bendounan

et al. 2017

Sci Rep

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“…The critical current density for our JJs is an order of magnitude higher than standard S-F-S JJs [17,31], despite the fact that our devices are almost 100 times longer, supporting the notion that exceptionally large triplet supercurrents can be generated in half-metallic ferromagnets. The device lengths are also significantly larger than the typical mean free path of CrO 2 , which is of the order of 50 nm [15,32]; therefore, our JJs are in the diffusive long junction limit. It has been theoretically predicted that the temperature dependence of the critical current of CrO 2 -based JJs would exhibit a peak at low temperature, and the position of the peak is determined by the junction length [15].…”

Section: Introductionmentioning

confidence: 92%

High-Quality CrO2 Nanowires for Dissipation-less Spintronics

et al. 2016

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Superconductor-ferromagnet (S-F) hybrids based on half-metallic ferromagnets, such as CrO 2 , are ideal candidates for superconducting spintronic applications. This is primarily due to the fully spin-polarized nature of CrO 2 , which produces enhanced long-range triplet proximity effects. However, reliable production of CrO 2 -based Josephson junctions (JJs) has proved to be extremely challenging because of a poorly controlled interface transparency and an incomplete knowledge of the local magnetization of the CrO 2 films. To address these issues, we use a bottom-up approach to grow CrO 2 nanowires on prepatterned substrates via chemical-vapor deposition. A comprehensive study of the growth mechanism enables us to reliably synthesize faceted, homogeneous CrO 2 wires with a well-defined magnetization state. Combining these high-quality wires with a superconductor produces JJs with a high interface transparency, leading to exceptionally large 100% spin-polarized supercurrents, with critical current densities exceeding 10 9 Am −2 over distances as long as 600 nm. These CrO 2 -nanowire-based JJs thus provide a realistic route to creating a scalable device platform for dissipation-less spintronics.

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“…2(b) and (c), as required by the symmetry of magnetic states under a positive and a negative magnetic field along the x-axis. To determine the intrinsic DWR and get rid of anisotropic magnetoresistance (AMR), we calculate the AMR contribution [38,40] assuming Bloch DW and tanh [18,41]:…”

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confidence: 99%

Resistance of domain-wall states in half-metallic CrO2

2018

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The half-metallic CrO 2 with nearly 100% spin polarization is an ideal system to study magnetic domain wall resistance, which differs from the resistance (or resistivity) inside a single-domain. To experimentally measure the domain wall resistance, we design and prepare a special CrO 2 epitaxial nanostructure with an asymmetrical weak link to localize a single domain wall, by using the techniques of chemical vapor deposition and selective-area growth. This structure provides a capability to generate and annihilate a domain wall near the weak link. By contrasting the resistance between a single-domain state and a domain state, we observe a repeatable and reversible resistance jump, namely domain wall resistance, in half metallic CrO 2. Using the Levy-Zhang model, we further obtain the spin asymmetry ratio / between resistivities in the two spin channels. The ratio, 4256 ± 388 at 5.0 K, is much larger than that of conventional ferromagnetic metals, attesting the half-metallicity of CrO 2 .

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Anomalous transport in half-metallic ferromagnetic CrO2

Cited by 33 publications

References 34 publications

Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

Giant Rashba effect at the topological surface of PrGe revealing antiferromagnetic spintronics

High-Quality CrO2 Nanowires for Dissipation-less Spintronics

Resistance of domain-wall states in half-metallic CrO2

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