  The Anomalous Nernst Effect (ANE) has garnered significant interest for
practical applications, particularly in energy harvesting and heat flux
sensing. For these applications, it is crucial for the module to operate
without an external magnetic field, necessitating a combination of a large ANE
and a substantial coercive force. However, most materials exhibiting a large
ANE typically have a relatively small coercive force. In our research, we have
explored the ANE in amorphous ferrimagnetic TbCo alloy films, noting that the
coercive force peaks at the magnetization compensation point (MCP). We observed
that transverse Seebeck coefficients are amplified with Tb doping, reaching
more than 1.0 uV/K over a wide composition range near the MCP, which is three
times greater than that of pure Co. Our findings indicate that this enhancement
is primarily due to direct conversion, a product of the transverse
thermoelectric component and electrical resistivity. TbCo films present several
significant advantages for practical use: a large ANE, the capability to
exhibit both positive and negative ANE, the flexibility to be deposited on any
substrate due to their amorphous nature, a low thermal conductivity, and a
large coercive force. These attributes make TbCo films a promising material for
advancing ANE-based technologies.
