Magnetocaloric properties of Mn5(Si,P)B2 compounds for energy harvesting applications

Hamutu Ojiyed, Maarten van den Berg, Ivan Batashev, Qi Shen, Niels van Dijk, Ekkes Brück*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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The magnetocaloric properties of Mn5Si1-xPxB2 (0 ≤ x ≤ 1) compounds were studied for energy harvesting applications. The crystal structure and the magnetic structure were characterized by powder X-Ray Diffraction and powder Neutron Diffraction. The results indicate that these magnetocaloric materials crystallize in the tetragonal Cr5B3-type crystal structure. The introduction of P causes a stretching of the c axis and compression of the a-b plane, leading to a decrease in the unit-cell volume V. In the ferromagnetic state the magnetic moments align within the a-b plane, and the magnetic moment of the Mn1 atom on the 16 l site is larger than that of the Mn2 atom on the 4c site. The Curie temperature TC can be adjusted continuously from 305 K (x = 1) to 406 K (x = 0) by replacing Si with P. The corresponding magnetic entropy change varies from 1.90 Jkg−1K−1 (x = 0) to 1.35 Jkg−1K−1 (x = 1) for a magnetic field change of 1 T. The PM-FM transition in these compounds corresponds to a second-order phase transition. Mn5Si1-xPxB2 compounds exhibit a magnetization difference of 28.1 - 31.3 Am2kg−1 for a temperature span of 30 K around TC in an applied magnetic field of 1 T. The considerable change in magnetization, the tunable TC near and above room temperature and the absence of thermal hysteresis make these compounds promising candidates for magnetocaloric energy harvesting materials.

Original languageEnglish
Article number173485
Number of pages10
JournalJournal of Alloys and Compounds
Publication statusPublished - 2024


  • Magnetocaloric effect
  • Magnetocaloric energy harvesting
  • Magnetocaloric materials
  • Mn(Si,P)B compounds
  • Second-order phase transition


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