Microstructure and magnetic properties studies of SmCo5 thin films grown on MgO and glass substrates

Zhang, L.N.; Hu, Jingtian; Chen, Jingsheng; Ding, Jun

doi:10.1016/j.jmmm.2009.03.062

Cited by 6 publications

(2 citation statements)

References 37 publications

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“…In general, graded interfaces produce high HC as they produce local energy minima and hinder domain wall motion by pinning 15 , however, smoother interfaces and smaller grains with large area grain boundaries are considered crucial for effective interfacial exchange coupling 16,17 . reported similar observations for SmCo5 samples fabricated on MgO(100) and glass substrates 7 .…”

Section: Resultssupporting

confidence: 70%

“…This exchange interaction across the soft-hard magnet interface depends not only on materials and their physical dimensions but also on the grain size and distribution of each phase, which makes it one of the poorly understood phenomenon in exchange-coupled systems. In thin films, substrate plays a key role in controlling microstructure that can come in the form of epitaxial guidance, epitaxial mismatch or even de-wetting at given processing conditions, making the microstructure is unique to a particular substrate 3,[5][6][7][8][9] . As a result, samples grown on different substrates can have very different magnetization reversal paths, producing different magnetic properties even for the same material combination.…”

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confidence: 99%

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The effect of Microstructure in Exchange Decoupling of SmCo5/Co bi-layers at low temperatures

Thantirige¹,

Pradhan²,

Tuominen³

2016

IOSR

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Here, we investigated the influence of grain formation on the magnetization reversal of SmCo5/Co at low temperature. A set of SmCo5/Co bi-layer samples were fabricated under identical conditions on MgO(100) and glass substrates with a Cr underlayer. Analysis of each magnetic layer by an Atomic Force Microscope (AFM) reveals that MgO(100) results small and uniform grain formation of 23 nm in contrast to 57 nm on glass, and x-ray diffraction studies show that the sample on MgO(100) has high crystallinity with SmCo5(11 2 0) phase. At room temperature, both samples exhibit good hard magnetic properties with coercivity (HC) of 13.2 kOe and 12.5 kOe, and energy products (BH)max of 14.5 MGOe and 5.3 MGOe for samples on MgO(100) and glass, respectively. Low temperature hysteresis measurements show an exchange decoupling at low temperatures for the sample on glass, and this is due to the formation of large grains on glass that reduces the effective inter-grain exchange coupling between phases.

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