Anomalous Nernst Effect in Flexible Co-Based Amorphous Ribbons

Abstract

Fe3Co67Cr3Si15B12 ribbons with a high degree of flexibility and excellent corrosion stability were produced by rapid quenching technique. Their structural, magnetic, and thermomagnetic (Anomalous Nernst Effect) properties were studied both in an as-quenched (NR) state and after stress annealing during 1 h at the temperature of 350∘C and a specific load of 230 MPa (AR). X-ray diffraction was used to verify the structural characteristics of our ribbons. Static magnetic properties were explored by inductive technique and vibrating sample magnetometry. The thermomagnetic curves investigated through the Anomalous Nernst Effect are consistent with the obtained magnetization results, presenting a linear response in the thermomagnetic signal, an interesting feature for sensor applications. Additionally, Anomalous Nernst Effect coefficient SANE values of 2.66μV/K and 1.93μV/K were estimated for the as-quenched and annealed ribbons, respectively. The interplay of the low magnetostrictive properties, soft magnetic behavior, linearity of the thermomagnetic response, and flexibility of these ribbons place them as promising systems to probe curved surfaces and propose multifunctional devices, including magnetic field-specialized sensors.

Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering

“… Comparison of a , the absolute values of S ANE and b , power factor for various spin-caloritronic amorphous alloys measured at room temperature. Notably, the Nanomet ribbon (present study) annealed at 653 K exhibits the significantly large | S ANE | and power factor value compared to that for the other reported alloys (Fe-Pt 37 , Fe x Sn 100-x 28 , CuCr 2 Se 3.9 Br 0.1 40 , Co 100-x Gd x 36 , 39 , Co 67 Fe 3 Cr 3 Si 15 Br 12 38 , and Sm 20 (Co 100-x Fe x ) 80 34 ). c Highlighting the mechanical flexibility of long, thin Nanomet ribbons prepared in different conditions: c .i.…”

Longitudinal Spin Seebeck Effect Thermopiles Based on Flexible Co-Rich Amorphous Ribbons/Pt Thin-Film Heterostructures

“…In the case under consideration, the material was magnetic. Experimentally, it is given by following equation [ 15 , 18 ]: where and are the thickness and thermal conductivity of the heterostructure, respectively, while and are corresponding quantities for the substrate. Then, from the dependence of with , is obtained from the equation: …”

“…The samples were prepared by a rapid quenching technique, following a procedure similar to that described in Refs. [ 18 , 37 , 38 ], thus obtaining ribbons with a length of up to 10 m. Amorphous ribbons were prepared by the melt-spinning technique onto a rotating roller. The master alloy of desired composition was melted in a quartz crucible using an inductor coil and ejected by Ar pressure jump onto a copper roller rotating at 470 rad/s in a vacuum chamber.…”

“…While there is a limited number of experimental works examining thermoelectric effects in ferromagnetic ribbons [ 18 , 19 ], the existing literature presents promising findings. Recently, we have explored the ANE effect in Fe 3 Co 67 Cr 3 Si 15 B 12 amorphous ribbons [ 18 ], disclosing the influence of the relaxation and annealing under stress of the amorphous samples on their thermoelectric response. In particular, for temperature differences of ΔT∼22 K, thermoelectric signals of about 30 μV were achieved.…”

Monitoring the Velocity of Domain Wall Motion in Magnetic Microwires

“…Amorphous soft magnetic materials, such as glass-coated microwires and ribbons, play a fundamental role in numerous technological applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. The most advanced application of these soft magnetic materials is their utilization in magnetometers and magnetic sensors [ 8 , 9 , 10 , 11 , 12 , 13 ]. This utilization is made possible by the exceptional magnetic properties and good mechanical properties of the materials, as well as the existence of a well-established and validated production and quality control system.…”