Magnetic phase transitions in CePtSn
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 T{sub N}=7.5K and undergoes an order{endash}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 B{sub c}, an exponential increase of the low-field magnetization, and a linear increase for B{gt}B{sub c}(=12.5T) at 2 K; B{sub c} decreases with increasing temperature. For B//b, qualitatively different M(B) curves are observed in two temperature regimes. For T{lt}3K, two MTs are found at 4 and 11 T, respectively, the former one irreversible. For T{ge}3K only the {open_quotes}11 T{close_quotes} transition remains with modified character and B{sub c} 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. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203999
- Journal Information:
- Journal of Applied Physics, Vol. 89, Issue 11; Other Information: DOI: 10.1063/1.1356033; Othernumber: JAPIAU000089000011007189000001; 211111MMM; PBD: 1 Jun 2001; ISSN 0021-8979
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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