Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films

Dyck D, Becker A, Koo J, Matalla-Wagner T, Krieft J, Reiss G (2021)
Physica status solidi B-Basic solid state phsyics 258(1): 2000067.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Herein, sputter-deposited ferromagnetic Weyl semimetal (WSM) and full-Heusler compound Co2TiGe is investigated. Crystal quality is analyzed using X-ray diffraction and reflectivity. In addition, temperature-dependent transport and magnetization measurements are carried out. The sample shows indications on the formation of L2(1)crystal structure. Magnetization measurements show a saturation magnetization of 1.98 mu(B)(f.u.)(-1)and 1.45 mu(B)(f.u.)(-1)at 50 and 300 K, respectively. This is in close agreement to the calculated value of 2 mu(B)(f.u.)(-1)at 0 K using the Slater-Pauling rule. The obtained Curie temperature is 378.5 K, which is close to prior results for bulk samples. The residual resistivity of 142.7 mu omega cm is mainly dominated by disorder scattering. At temperatures above 60 K, the Coulomb interaction dominates the resistance. The residual resistance ratio is around 1.49. Hall measurements show positive ordinary Hall and anomalous Hall constants and a positive dependence on temperature. Skew scattering and side jumps or intrinsic mechanisms contribute in similar amounts to the anomalous Hall resistivity, which indicates a higher than usual intrinsic contribution, which is expected for WSMs. The expected relation between the longitudinal and the anomalous Hall conductivity of sigma xyA proportional to sigma xx0is not met.
Stichworte
anomalous Hall effect; ferromagnetic half-metals; Heusler compounds; Weyl semimetals
Erscheinungsjahr
2021
Zeitschriftentitel
Physica status solidi B-Basic solid state phsyics
Band
258
Ausgabe
1
Art.-Nr.
2000067
ISSN
0370-1972
eISSN
1521-3951
Finanzierungs-Informationen
Open-Access-Publikationskosten wurden durch die Universität Bielefeld im Rahmen des DEAL-Vertrags gefördert.
Page URI
https://pub.uni-bielefeld.de/record/2945117

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Dyck D, Becker A, Koo J, Matalla-Wagner T, Krieft J, Reiss G. Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films. Physica status solidi B-Basic solid state phsyics. 2021;258(1): 2000067.
Dyck, D., Becker, A., Koo, J., Matalla-Wagner, T., Krieft, J., & Reiss, G. (2021). Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films. Physica status solidi B-Basic solid state phsyics, 258(1), 2000067. doi:10.1002/pssb.202000067
Dyck, D., Becker, A., Koo, J., Matalla-Wagner, T., Krieft, J., and Reiss, G. (2021). Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films. Physica status solidi B-Basic solid state phsyics 258:2000067.
Dyck, D., et al., 2021. Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films. Physica status solidi B-Basic solid state phsyics, 258(1): 2000067.
D. Dyck, et al., “Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films”, Physica status solidi B-Basic solid state phsyics, vol. 258, 2021, : 2000067.
Dyck, D., Becker, A., Koo, J., Matalla-Wagner, T., Krieft, J., Reiss, G.: Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films. Physica status solidi B-Basic solid state phsyics. 258, : 2000067 (2021).
Dyck, Denis, Becker, Andreas, Koo, Jungwoo, Matalla-Wagner, Tristan, Krieft, Jan, and Reiss, Günter. “Anomalous Hall Effect and Magnetoresistance in Sputter-Deposited Magnetic Weyl Semimetal Co2TiGe Thin Films”. Physica status solidi B-Basic solid state phsyics 258.1 (2021): 2000067.
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2021-01-22T07:56:41Z
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