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Phys. Rev. B 69, 020407(R) (2004) [4 pages]

Field-induced magnetization steps in intermetallic compounds and manganese oxides: The martensitic scenario

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V. Hardy1,2, S. Majumdar1, S. J. Crowe1, M. R. Lees1, D. McK. Paul1, L. Hervé2, A. Maignan2, S. Hébert2, C. Martin2, C. Yaicle2, M. Hervieu2, and B. Raveau2
1Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
2Laboratoire CRISMAT, UMR 6508, Boulevard du Maréchal Juin, 14050 Caen, France

Received 15 September 2003; published 23 January 2004

Field-induced magnetization jumps with similar characteristics are observed at low temperature for the intermetallic germanide Gd5Ge4 and the mixed-valent manganite Pr0.6Ca0.4Mn0.96Ga0.04O3. We report that the field location—and even the existence—of these jumps depends critically on the magnetic field sweep rate used to record the data. It is proposed that, for both compounds, the martensitic character of their antiferromagnetic-to-ferromagnetic transitions is at the origin of the magnetization steps.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.020407
DOI:
10.1103/PhysRevB.69.020407
PACS:
75.60.Ej, 81.30.Kf, 75.80.+q
 
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