Temperature Dependence of the Magnetic Properties of IrMn/CoFeB/Ru/CoFeB Exchange Biased Synthetic Antiferromagnets
by
Edoardo Albisetti *, Giuseppe Scaramuzzi, Christian Rinaldi, Matteo Cantoni, Riccardo Bertacco and Daniela Petti *
Edoardo Albisetti *, Giuseppe Scaramuzzi, Christian Rinaldi, Matteo Cantoni, Riccardo Bertacco and Daniela Petti *
Dipartimento di Fisica, Politecnico di Milano, Via Giuseppe Colombo 81, 20133 Milano, Italy
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(2), 387; https://doi.org/10.3390/ma13020387
Received: 21 December 2019 / Revised: 8 January 2020 / Accepted: 9 January 2020 / Published: 14 January 2020
(This article belongs to the Special Issue Magnetic Nanomaterials)
Synthetic antiferromagnets (SAF) are widely used for a plethora of applications among which data storage, computing, and in the emerging field of magnonics. In this framework, controlling the magnetic properties of SAFs via localized thermal treatments represents a promising route for building novel magnonic materials. In this paper, we study via vibration sample magnetometry the temperature dependence of the magnetic properties of sputtered exchange bias SAFs grown via magnetron sputtering varying the ferromagnetic layers and spacer thickness. Interestingly, we observe a strong, reversible modulation of the exchange field, saturation field, and coupling strength upon heating up to 250 °C. These results suggest that exchange bias SAFs represent promising systems for developing novel artificial magnetic nanomaterials via localized thermal treatment.
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Keywords:
synthetic antiferromagnet; exchange bias; interlayer exchange coupling; vibrating sample magnetometry; CoFeB; thermally assisted magnetic scanning probe lithography; magnetron sputtering
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MDPI and ACS Style
Albisetti, E.; Scaramuzzi, G.; Rinaldi, C.; Cantoni, M.; Bertacco, R.; Petti, D. Temperature Dependence of the Magnetic Properties of IrMn/CoFeB/Ru/CoFeB Exchange Biased Synthetic Antiferromagnets. Materials 2020, 13, 387.
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