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Structural characterization techniques, including X-ray diffraction, Raman spectroscopy, and HRTEM, confirmed the formation of an inverse spinel structure with a lattice parameter of\n                    <jats:inline-formula>\n                      <jats:alternatives>\n                        <jats:tex-math>$$a = 8.41$$<\/jats:tex-math>\n                        <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                          <mml:mrow>\n                            <mml:mi>a<\/mml:mi>\n                            <mml:mo>=<\/mml:mo>\n                            <mml:mn>8.41<\/mml:mn>\n                          <\/mml:mrow>\n                        <\/mml:math>\n                      <\/jats:alternatives>\n                    <\/jats:inline-formula>\n                    \u00a0\u00c5\u00a0and an average crystallite size of\n                    <jats:inline-formula>\n                      <jats:alternatives>\n                        <jats:tex-math>$$D= 17.7\\pm 6.5$$<\/jats:tex-math>\n                        <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                          <mml:mrow>\n                            <mml:mi>D<\/mml:mi>\n                            <mml:mo>=<\/mml:mo>\n                            <mml:mn>17.7<\/mml:mn>\n                            <mml:mo>\u00b1<\/mml:mo>\n                            <mml:mn>6.5<\/mml:mn>\n                          <\/mml:mrow>\n                        <\/mml:math>\n                      <\/jats:alternatives>\n                    <\/jats:inline-formula>\n                    nm. Raman peak fitting revealed broadened modes, consistent with phonon confinement effects. SQUID magnetometry confirmed superparamagnetic-like behavior of the nanoparticles at room temperature, characterized by low coercivity and remanence, with a blocking temperature of 210 K and saturation magnetization of\n                    <jats:inline-formula>\n                      <jats:alternatives>\n                        <jats:tex-math>$$M_{s}=51$$<\/jats:tex-math>\n                        <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                          <mml:mrow>\n                            <mml:msub>\n                              <mml:mi>M<\/mml:mi>\n                              <mml:mi>s<\/mml:mi>\n                            <\/mml:msub>\n                            <mml:mo>=<\/mml:mo>\n                            <mml:mn>51<\/mml:mn>\n                          <\/mml:mrow>\n                        <\/mml:math>\n                      <\/jats:alternatives>\n                    <\/jats:inline-formula>\n                    \u00a0emu\/g. Complementing the experimental work, we implemented a two-dimensional Ising model through Monte Carlo simulations to analyze the magnetic response within the nanoparticle system.\n                  <\/jats:p>","DOI":"10.1007\/s11051-025-06476-y","type":"journal-article","created":{"date-parts":[[2025,10,21]],"date-time":"2025-10-21T09:48:48Z","timestamp":1761040128000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Magnetic properties of CoFe$$_{2}$$O$$_{4}$$ nanoparticles: experimental characterization and numerical analysis using the Ising model"],"prefix":"10.1007","volume":"27","author":[{"given":"Luis Abraham","family":"Garc\u00eda-Hern\u00e1ndez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cuauhtemoc Benixoo","family":"Guzm\u00e1n-Hern\u00e1ndez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Goldie","family":"Oza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,10,21]]},"reference":[{"issue":"12","key":"6476_CR1","doi-asserted-by":"publisher","first-page":"12334","DOI":"10.1021\/acsanm.0c02811","volume":"3","author":"TC Coutinho","year":"2020","unstructured":"Coutinho TC, Malafatti JOD, Paris EC, Tardioli PW, Farinas CS (2020) Hydroxyapatite-$$\\text{ CoFe}_2\\text{ O}_4$$ magnetic nanoparticle composites for industrial enzyme immobilization, use, and recovery. 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