Mean-Field and Monte Carlo Studies of the Magnetic Properties of a Spin-7/2 and Spin-5/2 Ising Bilayer Film
We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-f...
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| Veröffentlicht in: | Journal of superconductivity and novel magnetism 2019-06, Vol.32 (6), p.1769-1779 |
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| container_end_page | 1779 |
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| container_issue | 6 |
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| container_title | Journal of superconductivity and novel magnetism |
| container_volume | 32 |
| creator | Karimou, M. Yessoufou, R. A. Ngantso, G. D. Hontinfinde, F. Benyoussef, A. |
| description | We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-field and external magnetic field effects on the spins are considered in the model. The magnetic order parameters and response functions are calculated as functions of the temperature for selected values of the model parameters and this enables one to devise thermal phase diagrams by both methods. Our calculations only reveal second-order phase boundaries. Under appropriate conditions, compensation point phenomena are detected in the calculations below the critical temperatures. When the system is exposed to the external magnetic constraint, attracting hysteresis phenomena are sometimes generated. The temperature dependence of the coercitive field for various values of the crystal-field is singled out. |
| doi_str_mv | 10.1007/s10948-018-4876-4 |
| format | Article |
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A. ; Ngantso, G. D. ; Hontinfinde, F. ; Benyoussef, A.</creator><creatorcontrib>Karimou, M. ; Yessoufou, R. A. ; Ngantso, G. D. ; Hontinfinde, F. ; Benyoussef, A.</creatorcontrib><description>We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-field and external magnetic field effects on the spins are considered in the model. The magnetic order parameters and response functions are calculated as functions of the temperature for selected values of the model parameters and this enables one to devise thermal phase diagrams by both methods. Our calculations only reveal second-order phase boundaries. Under appropriate conditions, compensation point phenomena are detected in the calculations below the critical temperatures. When the system is exposed to the external magnetic constraint, attracting hysteresis phenomena are sometimes generated. 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A.</creatorcontrib><creatorcontrib>Ngantso, G. D.</creatorcontrib><creatorcontrib>Hontinfinde, F.</creatorcontrib><creatorcontrib>Benyoussef, A.</creatorcontrib><title>Mean-Field and Monte Carlo Studies of the Magnetic Properties of a Spin-7/2 and Spin-5/2 Ising Bilayer Film</title><title>Journal of superconductivity and novel magnetism</title><addtitle>J Supercond Nov Magn</addtitle><description>We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-field and external magnetic field effects on the spins are considered in the model. The magnetic order parameters and response functions are calculated as functions of the temperature for selected values of the model parameters and this enables one to devise thermal phase diagrams by both methods. Our calculations only reveal second-order phase boundaries. Under appropriate conditions, compensation point phenomena are detected in the calculations below the critical temperatures. When the system is exposed to the external magnetic constraint, attracting hysteresis phenomena are sometimes generated. The temperature dependence of the coercitive field for various values of the crystal-field is singled out.</description><subject>Characterization and Evaluation of Materials</subject><subject>COMPUTERIZED SIMULATION</subject><subject>Condensed Matter Physics</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>CRITICAL TEMPERATURE</subject><subject>CRYSTAL FIELD</subject><subject>HYSTERESIS</subject><subject>ISING MODEL</subject><subject>LAYERS</subject><subject>MAGNETIC FIELDS</subject><subject>Magnetic Materials</subject><subject>MAGNETIC PROPERTIES</subject><subject>Magnetism</subject><subject>MEAN-FIELD THEORY</subject><subject>MONTE CARLO METHOD</subject><subject>ORDER PARAMETERS</subject><subject>Original Paper</subject><subject>PHASE DIAGRAMS</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>RESPONSE FUNCTIONS</subject><subject>Strongly Correlated Systems</subject><subject>Superconductivity</subject><subject>TEMPERATURE DEPENDENCE</subject><issn>1557-1939</issn><issn>1557-1947</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLAzEUhQdRsFZ_gLuA69i8k1lqsVqwKFTXIc1k2tRppiTpov_e9IFLV_d1zoH7VdU9Ro8YITlKGNVMQYQVZEoKyC6qAeZcQlwzefnX0_q6uklpjRDjFIlB9TNzJsCJd10DTGjArA_ZgbGJXQ_medd4l0DfgrxyYGaWwWVvwWfsty7m88mA-dYHKEfkGHAceBmmyYclePad2bsIJr7b3FZXremSuzvXYfU9efkav8H3j9fp-OkdWopFhoK1VtF24Wpla6qk4txhRVDbyIaJhgviJMJUSoQIxVYwg7lpy6YRslkQS4fVwym3T9nrZH12dmX7EJzNmpCa4OIrKnxS2dinFF2rt9FvTNxrjPSBqT4x1YWpPjDVrHjIyZOKNixd1Ot-F0N55h_TL2JsdpE</recordid><startdate>20190615</startdate><enddate>20190615</enddate><creator>Karimou, M.</creator><creator>Yessoufou, R. 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A.</creatorcontrib><creatorcontrib>Ngantso, G. D.</creatorcontrib><creatorcontrib>Hontinfinde, F.</creatorcontrib><creatorcontrib>Benyoussef, A.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of superconductivity and novel magnetism</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Karimou, M.</au><au>Yessoufou, R. A.</au><au>Ngantso, G. D.</au><au>Hontinfinde, F.</au><au>Benyoussef, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mean-Field and Monte Carlo Studies of the Magnetic Properties of a Spin-7/2 and Spin-5/2 Ising Bilayer Film</atitle><jtitle>Journal of superconductivity and novel magnetism</jtitle><stitle>J Supercond Nov Magn</stitle><date>2019-06-15</date><risdate>2019</risdate><volume>32</volume><issue>6</issue><spage>1769</spage><epage>1779</epage><pages>1769-1779</pages><issn>1557-1939</issn><eissn>1557-1947</eissn><abstract>We use standard Monte Carlo simulations based on the Metropolis algorithm and mean-field calculations to investigate the magnetic properties of an Ising bilayer film consisting of two superposed ferromagnetic squared lattices A and B whose magnetic atoms have spin 7/2 and 5/2 respectively. Crystal-field and external magnetic field effects on the spins are considered in the model. The magnetic order parameters and response functions are calculated as functions of the temperature for selected values of the model parameters and this enables one to devise thermal phase diagrams by both methods. Our calculations only reveal second-order phase boundaries. Under appropriate conditions, compensation point phenomena are detected in the calculations below the critical temperatures. When the system is exposed to the external magnetic constraint, attracting hysteresis phenomena are sometimes generated. The temperature dependence of the coercitive field for various values of the crystal-field is singled out.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10948-018-4876-4</doi><tpages>11</tpages></addata></record> |
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| subjects | Characterization and Evaluation of Materials COMPUTERIZED SIMULATION Condensed Matter Physics CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CRITICAL TEMPERATURE CRYSTAL FIELD HYSTERESIS ISING MODEL LAYERS MAGNETIC FIELDS Magnetic Materials MAGNETIC PROPERTIES Magnetism MEAN-FIELD THEORY MONTE CARLO METHOD ORDER PARAMETERS Original Paper PHASE DIAGRAMS Physics Physics and Astronomy RESPONSE FUNCTIONS Strongly Correlated Systems Superconductivity TEMPERATURE DEPENDENCE |
| title | Mean-Field and Monte Carlo Studies of the Magnetic Properties of a Spin-7/2 and Spin-5/2 Ising Bilayer Film |
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