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Barcode magnetic nanowires typically comprise a multilayer magnetic structurein a single body with more than one segment type. Interestingly, owing toselective functionalization and novel interactions between the layers, barcodemagnetic nanowires have attracted significant attention, particularly in thefield of bioengineering. However, an analysis of their magnetic properties atthe individual nanowire level remains challenging. With this background,herein, we investigated the characterization of magnetic nanowires at roomtemperature under ambient conditions based on magnetic images obtained viawide-field quantum microscopy with nitrogen-vacancy centers in diamond.Consequently, we could extract critical magnetic properties, such as thesaturation magnetization and coercivity, of single nanowires by comparing theexperimental results with those of micromagnetic simulations. This study opensup the possibility for a versatile characterization method suited to individualmagnetic nanowires.

Exploring the magnetic properties of individual barcode nanowires using wide-field diamond microscopy