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)...
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2025-02-01
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| 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 |
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| institution | DOAJ |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-02-01 |
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| 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 |