Hall effect in iron from 1 to 250 K and to 150 kOe

Klaffky, R. W.; Coleman, R. V.

doi:10.1103/physrevb.10.2915

Cited by 21 publications

(11 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The co-occurrent sign changes of both R 0 and σ AH strongly verify the globally varying curvature near the Fermi surface. In contrast, for Fe and Mn 5 Ge 3 films, the R 0 changes from the negative to positive near 80 K whereas the σ AH is always positive below room temperature, and the sign change is attributed to the change of the conductivity ratio of d and s bands instead of the global curvature change near the Fermi surface [31][32][33] . For NiPt thin films, the σ AH rather than R 0 changes the sign with T , which is attributed to other reasons rather than the global change of the curvature near the Fermi surface 34 .…”

mentioning

confidence: 89%

Tuning magnetotransport in PdPt/Y3Fe5O12: Effects of magnetic proximity and spin-orbit coupling

Zhou

Shi

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

Anisotropic magnetoresistance (AMR) ratio and anomalous Hall conductivity (AHC) in PdPt/Y 3 Fe 5 O 12 (YIG) system are tuned significantly by spin orbital coupling strength ξ through varying the Pt concentration. For both Pt/YIG and Pd/YIG, the maximal AMR ratio is located at temperatures for the maximal susceptibility of paramagnetic Pt and Pd metals. The AHC and ordinary Hall effect both change the sign with temperature for Pt-rich system and vice versa for Pd-rich system. The present results ambiguously evidence the spin polarization of Pt and Pd atoms in contact with YIG layers. The global curvature near the Fermi surface is suggested to change with the Pt concentration and temperature. PACS numbers: 72.25.Mk, 72.25.Ba, 75.70.-i * Correspondence author. Electronic mail: shiming@tongji.edu.cn 1 Generation, manipulation, and detection of pure spin current are popular topic in the community of spintronics because of its prominent advantage of negligible Joule heat in spintronic devices [1][2][3][4][5] . Pure spin current can be generated by spin Hall effect, spin Seebeck effect (SSE), and etc. By spin Hall effect, the pure spin current can be achieved in semiconductors due to strong spin orbital coupling (SOC). In the SSE approach, the spin current is produced in ferromagnetic materials with a temperature gradient and injected into another nonmagnetic layer through the interface. In general, the pure spin current cannot be probed by conventional electric approach. Instead, it is detected by inverse spin Hall effect 6,7 .With strong SOC in Pt layers and long spin diffusion length in Y 3 Fe 5 O 12 (YIG) insulator layers, the Pt/YIG systems are particularly suitable for design and fabrication of spintronic devices [8][9][10][11][12][13][14][15][16][17] . In studies of the SSE phenomena of Pt/YIG system, the SEE and the anomalous Nernst effect were argued to be entangled 9 , where the latter comes from the spin polarization due to the magnetic proximity effect (MPE) of the nearly ferromagnetic Pt layers. Many attempts have been made to study the MPE in Pt/YIG system. Since the atomic magnetic moment of Pt is too small to be measured by magnetometry, anisotropic magnetoresistance (AMR) and anomalous Hall effect (AHE) have been investigated intensively as a function of the Pt layer thickness and sampling temperature (T ) [10][11][12][13][14][15][16] . Up to date, however, magnetotransport results are controversial. The AMR ratio of Pt/YIG system exhibits an angular dependence different from the conventional AMR in magnetic films, and it changes nonmonotonically with the Pt layer thickness. Although these phenomena were attributed to spin Hall magnetoresistance (SMR) 14,15 instead of the conventional AMR, the nonmonotonic variation of the AMR with T cannot be understood in the SMR model 13 . Moreover, the ferromagnetic ordering in Pt layers was proved by the anomalous Hall effect (AHE) in Pt/YIG system 9 . In particular, the mechanism of the observed sign change of the AHE with T is still unclear. Very rece...

show abstract

mentioning

confidence: 89%

Tuning magnetotransport in PdPt/Y3Fe5O12: Effects of magnetic proximity and spin-orbit coupling

Zhou

Shi

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…It seems that the phonon side jump contribution should be similar to that of static impurities, and hence it should be insensitive to temperature (T ) [23,29,30]. This speculation has gained support from experiments performed at elevated temperatures where the longitudinal resistivity shows linear in T dependence [31][32][33]. Recently, researchers do realize that the sidejump from phonon and impurity scattering can be different, thereby the change of their relative importance with temperature can lead to T -dependent behavior [15,34].…”

Section: Introductionmentioning

confidence: 99%

Theory of the phonon side-jump contribution in anomalous Hall effect

et al. 2019

View full text Add to dashboard Cite

The role of electron-phonon scattering in finite-temperature anomalous Hall effect is still poorly understood. In this work, we present a Boltzmann theory for the side-jump contribution from electron-phonon scattering, which is derived from the microscopic quantum mechanical theory. We show that the resulting phonon side-jump conductivity generally approaches different limiting values in the high and low temperature limits, and hence can exhibit strong temperature dependence in the intermediate temperature regime. Our theory is amenable to ab initio treatment, which makes quantitative comparison between theoretical and experimental results possible.

show abstract

“…α 0 , c, c 0 and c 00 do not depend on the density of scatterers thus serve as scaling parameters, and ρ 0 tuned via changing the density of scatterers plays the role of a scaling variable. On the other hand, in many experiments the resistivity is tuned through temperature (T ) in a wide range where the electron-phonon scattering is important [8,9,[11][12][13][16][17][18][19]. For this scattering, most previous theoretical and experimental researches suggest the scaling relation [8,9,17,26,28,29] − ρ AH,1 = (c + c 1 + c 11 ) ρ 2 1 ,…”

mentioning

confidence: 99%

“…In time-reversal broken multiband electronic systems with strong spin-orbit coupling, the anomalous Hall effect originates from both the momentum-space Berry curvature and scattering off disorder [5][6][7]. In experiments the scaling relations linking the anomalous Hall resistivity ρ AH to the longitudinal resistivity ρ play the central role in identifying various contributions [8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Scaling parameters in anomalous and nonlinear Hall effects depend on temperature

2019

View full text Add to dashboard Cite

In the study of the anomalous Hall effect, the scaling relations between the anomalous Hall and longitudinal resistivities play the central role. The scaling parameters by definition are fixed as the scaling variable (longitudinal resistivity) changes. Contrary to this paradigm, we unveil that the electron-phonon scattering can result in apparent temperature-dependence of scaling parameters when the longitudinal resistivity is tuned through temperature. An experimental approach is proposed to observe this hitherto unexpected temperature-dependence. We further show that this phenomenon also exists in the nonlinear Hall effect in nonmagnetic inversion-breaking materials and may help identify experimentally the presence of the side-jump contribution besides the Berry-curvature dipole.

show abstract

Hall effect in iron from 1 to 250 K and to 150 kOe

Cited by 21 publications

References 29 publications

Tuning magnetotransport in PdPt/Y3Fe5O12: Effects of magnetic proximity and spin-orbit coupling

Tuning magnetotransport in PdPt/Y3Fe5O12: Effects of magnetic proximity and spin-orbit coupling

Theory of the phonon side-jump contribution in anomalous Hall effect

Scaling parameters in anomalous and nonlinear Hall effects depend on temperature

Contact Info

Product

Resources

About