Magnetic and electrical transport properties of Fe-doped Mn1.25Ga films deposited on different substrates

L10-MnGa alloys have attracted intensive attention due to their great potential in the field of magnetic recording, permanent magnets and spintronic devices. Here we present the magnetic and electrical transport properties of Fe-doped L10-Mn1.25Ga alloy films deposited on different substrates by magnetron sputtering. It is found that Fe-doped L10-Mn1.25Ga films deposited on both SrTiO3 and MgO substrates have high (0 0 1) orientation while the film deposited on MgO substrate has better magnetic property with larger magnetic anisotropy constant, coercivity, and a magnetic energy product of 3.0 MGOe, which is mainly due to strain arisen from the larger lattice mismatch. Moreover, the deposition temperature plays an important role in electrical transport properties of the films. The film deposited on SrTiO3 substrate at 250 °C shows an ordinary Hall effect while anomalous Hall effect when the deposition temperature is 300, 400 and 500 °C.