تقرير
Bulk-like magnetic properties in MBE-grown unstrained, antiferromagnetic CuMnSb
| العنوان: | Bulk-like magnetic properties in MBE-grown unstrained, antiferromagnetic CuMnSb |
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| المؤلفون: | Scheffler, L., Werther, J., Gas, K., Schumacher, C., Gould, C., Sawicki, M., Kleinlein, J., Molenkamp, L. W. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | A detailed study of the influence of molecular beam epitaxial growth conditions on the structural and magnetic characteristics of CuMnSb films on lattice matched GaSb is presented. For a set of nine 40~nm thick layers, the Mn and Sb fluxes are varied to produce material with different elemental compositions. It is found that the layers grown under a relative Mn to Sb flux ratio of $\Phi_{\text{Mn}}$/$\Phi_{\text{Sb}}=1.24\pm0.02$ are closest to the stoichiometric composition, for which the N\'{e}el temperature ($T_\text{N}$) attains its maximum values. Mn-related structural defects are believed to be the driving contribution to changes in the vertical lattice parameter. Having established the optimum growth conditions, a second set of samples with CuMnSb layer thickness varied from 5 to 510 nm is fabricated. We show that for sufficiently large thicknesses, the magnetic characteristics ($T_\text{N}\simeq62$ K, Curie-Weiss temperature $\Theta_\text{CW} = -100$ K) of the stoichiometric layers do correspond to the parameters reported for bulk samples. On the other hand, we observe a reduction of $T_\text{N}$ as a function of the CuMnSb thickness for our thinnest layers. All findings reported here are of particular relevance for studies aiming at the demonstration of N\'{e}el vector switching and detection in this noncentrosymmetric antiferromagnet, which have been recently proposed. Comment: The following article has been accepted by Applied Physics Letters. After it is published, it will be found at https://doi.org/10.1063/5.0092828Test |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/5.0092828 |
| الوصول الحر: | http://arxiv.org/abs/2206.13258Test |
| رقم الانضمام: | edsarx.2206.13258 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/5.0092828 |
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