Work

Magnon Spin Current Modulation through Magnetic Ion Doping in a Compensated Iron Garnet

Year: 2026

Type: article

Abstract: We report on the impact of manganese doping at the iron sites in Gadolinium Iron Garnet (GdIG, Gd$_{3}$Fe$_{5}$O$_{12}$), employing temperature-dependent spin Seebeck effect and ferromagnetic resonance measurements. Our findings reveal a clear shift in the magnetic compensation temperature $( T_{comp})$ in Mn-doped GdIG, with minimal changes observed in the magnetic and damping properties. Notably, the spin Seebeck signal strength was enhanced significantly with the Mn doping. This enhancement is plausibly associated with an increased spin mixing conductance and modifications in the magnon spectra, highlighting the tunability of GdIG’s spin Seebeck response and its potential for room-temperature spintronic applications.

Source: Journal of Physics D Applied Physics

DOI: 10.1088/1361-6463/aebedd

Authors: Anna Merin Francis, Murthykrishnan Panackal Balakrishnan Shailaja, Ratnamay Kolay, Ramesh Chandra Nath, Sunil Nair

Institutions: Indian Institute of Science Education and Research Pune, Indian Institute of Science Education and Research Thiruvananthapuram

Language: English

Topic: Magnetic properties of thin films

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Ministry of Education, India

OpenAlex ID: W4417163817

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