TY - JOUR
T1 - Magnetic properties of UFe5Sn single crystals
AU - Gonçalves, António Pereira
AU - Waerenborgh, J. C.
AU - Almeida, M.
AU - Godinho, M.
AU - Catarino, I.
AU - Bonfait, G.
AU - Noël, H.
N1 - This work was partially supported by the FCT (Portugal) under contract no. POCTI/CTM/12068/98. The collaboration between Rennes and Lisbon benefited from the ICCTI/CNRS bilateral exchange programme.
PY - 2003/4/1
Y1 - 2003/4/1
N2 - Millimetre-size UFe5Sn single crystals were grown by the top seed solution growth method and characterized by magnetization, 57Fe Mössbauer spectroscopy and specific heat measurements in order to study the magnetic transitions detected in powder samples at 248 and 178 K. The magnetization measurements show different behaviour along the three crystallographic directions but with similar values of spontaneous magnetization along a and c. The transition at 248K is associated with ferromagnetic ordering of iron moments along the c-axis, while the transition at lower temperature is associated with a reorientation towards b. Mössbauer data show that this reorientation is concomitant to the ordering of the Fe2 sites, which in a large proportion remain paramagnetic between the two transition temperatures. Specific heat measurements are consistent with the establishment of magnetic ordering at 248 K, followed by a spin reorientation at 178 K, yielding γ(0 K)≅140 mJ/(molK2) and θ≅290 K for UFe5Sn.
AB - Millimetre-size UFe5Sn single crystals were grown by the top seed solution growth method and characterized by magnetization, 57Fe Mössbauer spectroscopy and specific heat measurements in order to study the magnetic transitions detected in powder samples at 248 and 178 K. The magnetization measurements show different behaviour along the three crystallographic directions but with similar values of spontaneous magnetization along a and c. The transition at 248K is associated with ferromagnetic ordering of iron moments along the c-axis, while the transition at lower temperature is associated with a reorientation towards b. Mössbauer data show that this reorientation is concomitant to the ordering of the Fe2 sites, which in a large proportion remain paramagnetic between the two transition temperatures. Specific heat measurements are consistent with the establishment of magnetic ordering at 248 K, followed by a spin reorientation at 178 K, yielding γ(0 K)≅140 mJ/(molK2) and θ≅290 K for UFe5Sn.
KW - CeCuAu-type structure
KW - Magnetic intermetallic
KW - UFeSn
KW - Uranium intermetallic
UR - http://www.scopus.com/inward/record.url?scp=0038010673&partnerID=8YFLogxK
U2 - 10.1016/S0304-8853(02)01405-1
DO - 10.1016/S0304-8853(02)01405-1
M3 - Article
AN - SCOPUS:0038010673
SN - 0304-8853
VL - 260
SP - 473
EP - 479
JO - Journal Of Magnetism And Magnetic Materials
JF - Journal Of Magnetism And Magnetic Materials
IS - 3
ER -