Magnetocaloric effect in d-metal phosphides and arsenides

Daniel Fruchart 6F. Allab 5M. Balli 6D. Gignoux 3E.K. Hlil 6A. Lebouc 5Nataliya Skryabina 2,6J. Toboła 1P. Wolfers 6R. Zach 1

1. AGH University of Science and Technology (AGH), al. Mickiewicza 30, Kraków 30-059, Poland
2. Perm State University (PermSU), 15 Bukireva st., Perm 614990, Russian Federation
3. Laboratoire Louis Néel, CNRS (LLN), 25 Av. des Martyrs, Grenoble 38042, France
4. Laboratoire de Cristallographie du CNRS (LC), BP 166, Grenoble ·38042, France
5. LEG (ENSIEG), BP 46, Saint Martin d'Hères 38402, France
6. Laboratoire de Cristallographie du CNRS (LC), BP 166, Grenoble ·38042, France

Abstract

We present a wide analysis of both the crystal structure peculiarities and the different aspects of magnetic properties, leading to better understand the many magneto-elastic effects exhibited by the MM’X series of transition metal phosphides and arsenides. Moreover, systematic neutron diffraction experiments have been performed thus allowing anticipate on the different contributions to entropy. Besides high magnetic field measurement namely under pressure were performed to quantify the most pertinent (T, P, H) phase diagrams. Finally, fair insights of the electronic polarisation instabilities were deduced from KKR-CPA band structure calculations. All the previous fundamental analyses lead to comfort the very interesting magneto-caloric contributions exhibited by the MM’X series. Comparison is made with other high performance MCE systems.

 

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Presentation: invited oral at E-MRS Fall Meeting 2005, Symposium B, by Daniel Fruchart
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-08-10 08:34
Revised:   2009-06-07 00:44