Imaging the magnetic nano-domains in Nd2Fe14B

Date
2016-01-01
Authors
Kaminski, Adam
Mou, Daixiang
Canfield, Paul
Taufour, Valentin
Huang, Lunan
Budko, Serguei
Schrunk, Benjamin
Lamichhane, Tey
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Ames Laboratory
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Abstract

We study magnetic domains in Nd2Fe14B single crystals using high resolution magnetic force microscopy (MFM). Previous MFM studies and small angle neutron scattering experiments suggested the presence of nano-scale domains in addition to optically detected micrometer-scale ones. We find, in addition to the elongated, wavy nano-domains reported by a previous MFM study, that the micrometer size, star shape fractal pattern is constructed of an elongated network of nano-domains ~20 nm in width, with resolution-limited domain walls thinner than 2 nm. While the microscopic domains exhibit significant resilience to an external magnetic field, some of the nano domains are sensitive to the magnetic field of the MFM tip.

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ferromagnets, magnetic domains, magnetic force microscopy
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