The effect of boron doping on crystal structure, magnetic properties and magnetocaloric effect of DyCo₂

Journal Article · Sat Dec 19 00:00:00 EST 2015 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2015.12.062· OSTI ID:1245627

Wang, C. L. ^[1]; Liu, J. ^[2]; Mudryk, Y. ^[2]; Gschneidner, Jr., K. A. ^[2]; Long, Y. ^[3]; Pecharsky, V. K. ^[2]

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1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Univ. of Science and Technology of Beijing (People's Republic of China)
2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
3. Univ. of Science and Technology of Beijing (People's Republic of China)

In this study, the magnetic properties and magnetic entropy changes of DyCo₂B_x (x=0, 0.05, 0.1, and 0.2) alloys were investigated. The Curie temperature (TC) increases with increasing B concentration. The frequency dependence of ac magnetic susceptibility of DyCo₂ caused by the narrow domain wall pinning effect is depressed by B doping, but the coercivity and the magnetic viscosity are prominently increased in the B doped alloys. The magnetic transition nature of DyCo₂B_x changes from the first-order to the second-order with increasing x, which leads to the decrease of the maximum magnetic entropy change. However, the relative cooling power (RCP) of DyCo₂ and the B doped alloys remains nearly constant.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1245627
• Alternate ID(s): OSTI ID: 1396777
• Report Number(s): IS-J-8939; PII: S0304885315309252
• Journal Information: Journal of Magnetism and Magnetic Materials, Vol. 405, Issue C; ISSN 0304-8853
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
magnetic entropy changes
magnetocaloric effect
magnetic properties
magnetic viscosity
magnetic transition nature