FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle

We investigated the hysteresis, pseudo-critical, and compensation behaviors of a quasi-spherical FeCo alloy nanoparticle (2 nm in diameter) using Monte Carlo simulations with thermal bath-type algorithms and a 3D mixed Ising model. The nanostructure was modeled in a body-centered cubic lattice (BCC)...

Full description

Saved in:
Bibliographic Details
Main Authors: Julio Cesar Madera, Elisabeth Restrepo-Parra, Nicolás De La Espriella
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Nanomaterials
Subjects:
Online Access:https://www.mdpi.com/2079-4991/15/5/320
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1850030282470588416
author Julio Cesar Madera
Elisabeth Restrepo-Parra
Nicolás De La Espriella
author_facet Julio Cesar Madera
Elisabeth Restrepo-Parra
Nicolás De La Espriella
author_sort Julio Cesar Madera
collection DOAJ
description We investigated the hysteresis, pseudo-critical, and compensation behaviors of a quasi-spherical FeCo alloy nanoparticle (2 nm in diameter) using Monte Carlo simulations with thermal bath-type algorithms and a 3D mixed Ising model. The nanostructure was modeled in a body-centered cubic lattice (BCC) through the following configurations: spin <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mo>=</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></semantics></math></inline-formula> for Co and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>Q</mi><mo>=</mo><mn>2</mn></mrow></semantics></math></inline-formula> for Fe. These simulations reveal that, under the influence of crystal and magnetic fields, the nanoparticle exhibits compensation phenomena, exchange bias, and pseudo-critical temperatures. Knowledge of this type of phenomena is crucial for the design of new materials, since compensation temperatures and exchange bias improve the efficiency of advanced magnetic devices, such as sensors and magnetic memories. Meanwhile, pseudo-critical temperatures allow the creation of materials with controlled phase transitions, which is vital for developing technologies with specific magnetic and thermal properties. An increase in single-ion anisotropies within the nanosystem leads to higher pseudo-critical and compensation temperatures, as well as superparamagnetic behavior at low temperatures.
format Article
id doaj-art-9dce43e486454e51a8aaaad764dbca0e
institution DOAJ
issn 2079-4991
language English
publishDate 2025-02-01
publisher MDPI AG
record_format Article
series Nanomaterials
spelling doaj-art-9dce43e486454e51a8aaaad764dbca0e2025-08-20T02:59:15ZengMDPI AGNanomaterials2079-49912025-02-0115532010.3390/nano15050320FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical NanoparticleJulio Cesar Madera0Elisabeth Restrepo-Parra1Nicolás De La Espriella2Grupo Teseeo, Facultad de Ciencias e Ingenierías, Departamento de Ciencias Básicas, Universidad del Sinú-Elías Bechara Zainúm, Monteria 230001, ColombiaPCM Computational Applications, Facultad de Ciencias Básicas, Departamento de Física, Universidad Nacional de Colombia, Manizales 170001, ColombiaFacultad de Ciencias Básicas, Departamento de Física y Electrónica, Universidad de Córdoba, Monteria 230002, ColombiaWe investigated the hysteresis, pseudo-critical, and compensation behaviors of a quasi-spherical FeCo alloy nanoparticle (2 nm in diameter) using Monte Carlo simulations with thermal bath-type algorithms and a 3D mixed Ising model. The nanostructure was modeled in a body-centered cubic lattice (BCC) through the following configurations: spin <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mo>=</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></semantics></math></inline-formula> for Co and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>Q</mi><mo>=</mo><mn>2</mn></mrow></semantics></math></inline-formula> for Fe. These simulations reveal that, under the influence of crystal and magnetic fields, the nanoparticle exhibits compensation phenomena, exchange bias, and pseudo-critical temperatures. Knowledge of this type of phenomena is crucial for the design of new materials, since compensation temperatures and exchange bias improve the efficiency of advanced magnetic devices, such as sensors and magnetic memories. Meanwhile, pseudo-critical temperatures allow the creation of materials with controlled phase transitions, which is vital for developing technologies with specific magnetic and thermal properties. An increase in single-ion anisotropies within the nanosystem leads to higher pseudo-critical and compensation temperatures, as well as superparamagnetic behavior at low temperatures.https://www.mdpi.com/2079-4991/15/5/320FeCo nanoparticleshysteresiscompensation temperaturepseudo-critical temperatures
spellingShingle Julio Cesar Madera
Elisabeth Restrepo-Parra
Nicolás De La Espriella
FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
Nanomaterials
FeCo nanoparticles
hysteresis
compensation temperature
pseudo-critical temperatures
title FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
title_full FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
title_fullStr FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
title_full_unstemmed FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
title_short FeCo: Hysteresis, Pseudo-Critical, and Compensation Temperatures on Quasi-Spherical Nanoparticle
title_sort feco hysteresis pseudo critical and compensation temperatures on quasi spherical nanoparticle
topic FeCo nanoparticles
hysteresis
compensation temperature
pseudo-critical temperatures
url https://www.mdpi.com/2079-4991/15/5/320
work_keys_str_mv AT juliocesarmadera fecohysteresispseudocriticalandcompensationtemperaturesonquasisphericalnanoparticle
AT elisabethrestrepoparra fecohysteresispseudocriticalandcompensationtemperaturesonquasisphericalnanoparticle
AT nicolasdelaespriella fecohysteresispseudocriticalandcompensationtemperaturesonquasisphericalnanoparticle