Influence of longitudinal electric field on the oscillating magnetocaloric effect of graphenes

TL;DR

This study investigates how a longitudinal electric field affects the magnetocaloric properties of graphene, revealing modifications in entropy change magnitude and temperature of maximum effect due to the electric field.

Contribution

It introduces a detailed analysis of electric field influence on graphene's magnetocaloric effect, highlighting the oscillating and periodic contributions to magnetic entropy change.

Findings

Electric field alters the maximum magnetic entropy change.

The temperature of maximum entropy change decreases with electric field.

Electric field modifies the oscillating and periodic components of entropy.

Abstract

The present effort explores the influence of a longitudinal applied electric field on the magnetocaloric properties of graphenes. The magnetic entropy change $\Delta S(T,\Delta B,E)$ has two contributions: $S_{cos}(T,B,E)$ with an oscillating character on $m$, inversely proportional to the magnetic field; and $S_{per}(T,B,E)$ with a periodic character also on $m$. In comparison to the case without electric field, the maximum value of the magnetic entropy change either increases or decreases due to an applied electric field, depending on the value of $m$; and, in addition, the temperature in which the maximum entropy change occurs decreases due to the electric field.