| For decades, study on properties of strange quark matter is one of the hot topics in particle physics and nuclear physics. The additional strangeness freedom degree can lower the Fermi level of system constructed by light quarks, and makes the strange quark matter more stable camparison with non-strange quark matter. Witten’s hypotheses motivates physists seeking for strange stars and strangelets. As a fundamental theory interpreting strong interaction, QCD successfully describes the quark confinement mechanism and asymptotic freedom. However, there are difficuties when people deal wih the finite density conditons in QCD formalism. There is still need using phenomenol-ogical model. The MIT bag model draws people’s attention by its simplicity and successfully interpreting quark confinement, especially applicated in the study of strangelets with the finite size effect.We study the stability properties of magnetized strange quark matter and strangelets under a strong magnetic field in the MIT bag model. The free energy per baryon of strange quark matter feels a great influence from the magnetic field. At the field strength about～1017G, the magnetized strange quark matter becomes more stable. Considering the finite size effect, the magnetic influence on strangelets becomes complicated. For a given magnetic field, there exists a critical baryon number, below which the magnetized strangelets have lower energy than the non-magnetized stangelets. For the field strength of 5×1017G, the critical baryon number is Ac～100. Generally, the critical baryon number increases with the decreased external magnetic field. |
