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MA: Fachverband Magnetismus

MA 2: Magnetic Materials I

MA 2.2: Talk

Monday, March 7, 2016, 09:45–10:00, H31

Magnetic neutron scattering on textured and isotropic Nd-Fe-B-based nanocomposites — •Raoul Weber¹, Andreas Michels¹, Élio Alberto Périgo¹, Ivan Titov¹, Denis Mettus¹, Joachim Kohlbrecher², Masao Yano³, Akira Kato³, Masaaki Ito⁴, and Kiyonori Suzuki⁵ — ¹Physics and Materials Science Research Unit, University of Luxembourg — ²Paul Scherrer Institut, Switzerland — ³Toyota Motor Corporation, Japan — ⁴Institut Néel, Grenoble, France — ⁵Monash University, Clayton, Australia

Nd-Fe-B nanocomposite permanent magnets, which consist of exchange-coupled hard (Nd₂Fe₁₄B) and soft (α−Fe) magnetic phases, are of potential interest for electronic devices due to their preeminent magnetic properties such as high remanence and magnetic energy product. Based on recent density-functional-theory calculations which predict a dependency of the exchange coupling on the crystallographic orientation at the interface between Nd₂Fe₁₄B and α−Fe (ferromagnetic ↔ antiferromagnetic), we have carried out a comparative study of the magnetic microstructure of textured and isotropic nanocrystalline Nd₂Fe₁₄B/α−Fe by means of magnetic-field-dependent small-angle neutron scattering.