Chirality-induced effective magnetic field in a phthalocyanine molecule

TL;DR

This study demonstrates a chirality-dependent effective magnetic field in a multilayer system with chiral phthalocyanine molecules, revealing a new mechanism for spin manipulation in molecular spintronics without external bias.

Contribution

It reports the first observation of a chirality-induced magnetic field in a molecular system without bias current, advancing chiral molecular spintronics research.

Findings

Chirality-dependent shift in magnetic hysteresis loops.

Effective magnetic field observed without bias current.

Potential new mechanism for spin control in molecules.

Abstract

Chirality in organic molecules has attracted considerable attention in the fields of chemistry, biology, and spintronics. This paper reports on perpendicular magnetization hysteresis loops of a multilayer consisting of ultrathin Fe (001), chiral phthalocyanine molecule ((P)- or (M)-PbPc-DTBPh), and MgO (001). We find a chirality-dependent shift of the hysteresis loop. Unlike the previously reported bias current induced phenomena, the result shows a chirality-induced effective magnetic field in the phthalocyanine molecule in the absence of a bias current in the system. This study opens up a new direction in the emerging field of chiral molecular spintronics.