TY - JOUR
T1 - Coercivity and squareness enhancement in ball-milled hard magnetic-antiferromagnetic composites
AU - Sort, J.
AU - Nogués, J.
AU - Suriñach, S.
AU - Muñoz, J. S.
AU - Baró, M. D.
AU - Chappel, E.
AU - Dupont, F.
AU - Chouteau, G.
PY - 2001/8/20
Y1 - 2001/8/20
N2 - The room-temperature coercivity, Hc, and squareness, MR/MS (remanence/saturation magnetizations), of permanent magnet, SmCo5 powders have been enhanced by ball milling with antiferromagnetic NiO (with Néel temperature, TN = 590 K). This enhancement is observed in the as-milled state. However, when the milling of SmCo5 is carried out with an antiferromagnet with TN below room temperature (e.g., for CoO, TN = 290 K), the coercivity enhancement is only observed at low temperatures after field cooling through TN. The ferromagnetic-antiferromagnetic exchange coupling induced either by local heating during milling (SmCo5 + NiO) or field cooling (SmCo5 + CoO) is shown to be the origin of the Hc increase. © 2001 American Institute of Physics.
AB - The room-temperature coercivity, Hc, and squareness, MR/MS (remanence/saturation magnetizations), of permanent magnet, SmCo5 powders have been enhanced by ball milling with antiferromagnetic NiO (with Néel temperature, TN = 590 K). This enhancement is observed in the as-milled state. However, when the milling of SmCo5 is carried out with an antiferromagnet with TN below room temperature (e.g., for CoO, TN = 290 K), the coercivity enhancement is only observed at low temperatures after field cooling through TN. The ferromagnetic-antiferromagnetic exchange coupling induced either by local heating during milling (SmCo5 + NiO) or field cooling (SmCo5 + CoO) is shown to be the origin of the Hc increase. © 2001 American Institute of Physics.
U2 - https://doi.org/10.1063/1.1392308
DO - https://doi.org/10.1063/1.1392308
M3 - Article
SN - 0003-6951
VL - 79
SP - 1142
EP - 1144
JO - Applied Physics Letters
JF - Applied Physics Letters
ER -