2026-06-27T15:24:55Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/63852023-08-26T15:55:46Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Bartolomé, Pablo
author
Ranchal Sánchez, Rocío
2023-06-16T15:20:02Z
2023-06-16T15:20:02Z
2020-08-14
0957-4484
10.1088/1361-6528/ab8fe7
https://hdl.handle.net/20.500.14352/6385
http://dx.doi.org/10.1088/1361-6528/ab8fe7
https://iopscience.iop.org
Here we report the possibility of creating synthetic domain walls in nominal (Fe72Ga28/Tb33Fe67)_2 multilayers. The magnetization as a function of the temperature reveals the absence of Compensation temperature in the samples which can be understood considering an interdiffusion process that results in the formation of TbFeGa alloys at the nominal FeGa layers. Therefore, samples actually comprise TbFeGa and TbFe layers. The hysteresis loops exhibit magnetization steps related to the nucleation of domain walls formed because of the competition between different interactions: (i) the antiferromagnetic exchange coupling between the heavy rare earth (Tb) and the transition magnetic metal (Fe) inside each layer, (ii) the antiferromagnetic coupling between Tb and Fe at the interfaces, and (iii) the Zeeman energy. In good agreement with the experimental values, the nucleation field of the domain walls has been theoretically calculated taking into account the tilt of the magnetization with respect to the sample plane. Our experimental results indicate that by a proper thickness adjustment, it can be tuned, both the value of the nucleation field and the layer in which this firstly occurs. Experimental values for the exchange bias field have also been calculated.
eng
Atribución-NoComercial-SinDerivadas 3.0 España
Synthetic domain walls in (TbFeGa/TbFe)_2 multilayers
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Ranchal 16 postprint+EMB_14_ago_2021.pdf
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Ranchal 16 postprint+EMB_14_ago_2021.pdf.txt