ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Magnetization (M) and specific-heat measurements of a CePtSn single crystal in magnetic fields up to 14 T applied along principal crystallographic axes are reported. CePtSn becomes antiferromagnetic at TN=7.5 K and undergoes an order–order transition at 5 K (in zero field). In a field applied along the a axis (B//a) a metamagnetic transition (MT) is induced that is manifest by a cusp on the M(B) curve at a critical field Bc, an exponential increase of the low-field magnetization, and a linear increase for B〉Bc(=12.5 T) at 2 K; Bc decreases with increasing temperature. For B//b, qualitatively different M(B) curves are observed in two temperature regimes. For T〈3 K, two MTs are found at 4 and 11 T, respectively, the former one irreversible. For T≥3 K only the "11 T" transition remains with modified character and Bc is rapidly decreasing with increasing temperature. These MTs are associated with previously reported GMR effects. Microscopic aspects of these phenomena are discussed and updated magnetic-phase diagrams for B//a and B//b, respectively, are presented. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1356033
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