Discrete Change of Spin-Density-Wave Modulation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">r</mml:mi><mml:mo>(</mml:mo><mml:mn>100</mml:mn><mml:mo>)</mml:mo><mml:mo>/</mml:mo><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">n</mml:mi></mml:math>Multilayers as a Function of Cr Layer Thickness

Mibu, Ko; Takeda, M.; Suzuki, Jun–ichi; Nakanishi, A.; Kobayashi, Takayuki; Endoh, Y.; Shinjo, Teruya

doi:10.1103/physrevlett.89.287202

Cited by 19 publications

(8 citation statements)

References 16 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. This is exactly what is observed and is similar to that reported for Cr=Sn superlattices [14]. There are a series of diffraction peaks that are separated by q z a=, where is the superlattice period (the sum of the Cr and CrMn layer thickness values).…”

supporting

confidence: 88%

“…However, such measurements reveal the coupling of the Fe layers but do not directly measure the magnetic ordering within the Cr layer. Recent neutron scattering measurements of Cr=Sn superlattices show that Sn layers only one monolayer thick are able to pin the antinodes of the Cr ISDW [14]. This leads to discrete changes in the period with Cr thickness, as predicted for Fe=Cr superlattices.…”

mentioning

confidence: 83%

“…However, it can be shown that the intensity of the Bragg peaks with even values of the m index are suppressed, resulting in the observation of only the odd order reflections that can be indexed to q z m 1 2 a=. Thus, one can determine directly from the neutron scattering whether there is an even or odd number of ISDW nodes within the Cr layers simply from the position of the Bragg peaks [14]. At low temperature, we find an odd number of nodes for the 200-, 63-, and 44-Å Cr layers, while there is an even number of nodes for the 100-Å Cr layer.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Hysteretic Spin-Density-Wave Ordering in Confined Geometries

Fullerton

Robertson

Prinsloo³

et al. 2003

Phys. Rev. Lett.

View full text Add to dashboard Cite

We have measured the antiferromagnetic spin-density-wave (SDW) order in Cr/Cr(97.5)Mn2.5(001) superlattices. The Mn doping creates a high Néel temperature layer that confines the incommensurate SDW order within the Cr layers. With temperature cycling we observe a transition from commensurate to incommensurate SDW order and discrete changes in the SDW period. We find that these transitions show significant hysteresis (up to 75 K) when the number of SDW nodes within the Cr layer changes by an odd number, while there is no hysteresis for changes of an even number of nodes. This results from the competition between maintaining the spin structure at the interfaces and introducing a spin slip at the nodes of the Cr SDW.

show abstract

supporting

confidence: 88%

mentioning

confidence: 83%

mentioning

confidence: 99%

See 1 more Smart Citation

Hysteretic Spin-Density-Wave Ordering in Confined Geometries

Fullerton

Robertson

Prinsloo³

et al. 2003

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…32 Enhanced Cr magnetic fields at Cr/ Sn interfaces were also reported to be detected by Mössbauer spectroscopy. 33,34 We speculate that Almokhtar et al 17 may have detected local Cr magnetic moments that appeared due to nonideal structures and local strains at Cr/ Sn interfaces in Cr/ V superlattices, which would be nonmagnetic without Sn probe layers. The 50-Å dead-layer thickness agrees well with the proximity effects observed in V / Cr/ Fe heterostructures, where for a thickness of 50 Å a strong suppression of T c was observed.…”

Section: Discussionmentioning

confidence: 80%

Onset of spin-density-wave antiferromagnetism inCr∕Vmultilayers

et al. 2007

View full text Add to dashboard Cite

Spin-density-wave ͑SDW͒ magnetism in a series of Cr/ V heterostructures with different Cr thicknesses was systematically investigated by combined resistivity, neutron, and synchrotron scattering measurements. We show that the onset of the bulklike SDW state comes through several necessary steps from a paramagnetic state through a commensurate SDW to an incommensurate SDW. The Néel temperature for the incommensurate SDW is found to scale with Cr thickness and reaches the bulk value at a Cr thickness of about 2000 Å. The proximity effect from Cr/ V interfaces is found to lead to ͑i͒ the appearance of a 50-Å magnetically dead Cr layer near Cr/ V interfaces and ͑ii͒ suppression of the spin-flip transition and stabilization of a single-domain SDW with out-of-plane spins and out-of-plane propagation wave vector. Finally, we show that the SDW period increases with decreasing Cr thickness and becomes temperature independent in sufficiently thin Cr layers.

show abstract

“…When the ISDW is confined in Cr films with non- magnetic interfaces, as is the case in our Cr films, we expect a configuration with antinodes (or nodes) 12 at the films' surfaces. For this case, the available modes are separated by half a wavelength.…”

Section: Resultsmentioning

confidence: 69%

Effects of spin density wave quantization on the electrical transport in epitaxial Cr thin films

et al. 2012

View full text Add to dashboard Cite

We present measurements of the electrical resistivity, ρ, in epitaxial Cr films of different thicknesses grown on MgO (100) substrates, as a function of temperature, T . The ρ(T ) curves display hysteretic behavior in certain temperature range, which is film thickness dependent. The hysteresis are related to the confinement of quantized incommensurate spin density waves (ISDW) in the film thickness. Our important finding is to experimentally show that the temperature T mid where the ISDW changes from N to N + 1 nodes decreases as the film thickness increases. Identifying T mid with a first order transition between ISDW states with N and N + 1 nodes, and using a Landau approach to the free energy of the ISDW together with Monte Carlo simulations, we show that the system at high temperatures explores all available modes for the ISDW, freezing out in one particular mode at a transition temperature that indeed decreases with film thickness, L. The detailed dependence of T mid (L) seems to depend rather strongly on the boundary conditions at the Cr film interfaces.

show abstract

Discrete Change of Spin-Density-Wave Modulation inCr(100)/SnMultilayers as a Function of Cr Layer Thickness

Cited by 19 publications

References 16 publications

Hysteretic Spin-Density-Wave Ordering in Confined Geometries

Hysteretic Spin-Density-Wave Ordering in Confined Geometries

Onset of spin-density-wave antiferromagnetism inCr∕Vmultilayers

Effects of spin density wave quantization on the electrical transport in epitaxial Cr thin films

Contact Info

Product

Resources

About