Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-26T08:32:15.994Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetocaloric Effects of Binary Rare Earth Nitrides

Published online by Cambridge University Press:  01 February 2011

Yusuke Hirayama ,
Takashi Nakagawa ,
Takafumi Kusunose  and
Takao A. Yamamoto
Yusuke Hirayama
Affiliation:
y-hirayama@mit.eng.osaka-u.ac.jp, Osaka university, engineering, Yamadaoka 2-1, Osaka,Suita, N/A, Japan
Takashi Nakagawa
Affiliation:
nakagawat@abe.pe.titech.ac.jp, Tokyo Institute of Technology, Graduate School of Science and Engineering, Meguro, Tokyo, 152-8552, Japan
Takafumi Kusunose
Affiliation:
kusuno15@sanken.osaka-u.ac.jp, Osaka university, Institute of Scientific and Industrial Research, Osaka, Ibaraki, 567-0047, Japan
Takao A. Yamamoto
Affiliation:
takao@mit.eng.osaka-u.ac.jp, Osaka univesity, Graduate School of Engineering, 2-1 Yamada-oka, Osaka, Suita, 565-0871, Japan
Get access

Abstract

We synthesized HoxEr1−xN (x =0.1, 0.3, 0.5, 0.7, 0.9) by the carbothermic reduction method. The magnetic entropy change, ΔS, which is an indicator of performance of magnetocaloric effect, MCE, was obtained from data sets of magnetization M (H, T) measured at various temperature, T, and magnetic field, H, through the Maxwell equations. The Thus obtained ΔS vs. T curves have peaks at temperatures depending on x in a range of 8–18 K. ΔS values of HoxEr1−xN expressed in terms of J K−1 m−3 were higher than those of intermetallic compounds of rare earth and transition metals previously reported. These ΔS peak plots are along a convex curve, which may indicate an interaction between the two components.

Keywords

nitridemagnetic propertiesferromagnetic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1040: Symposium Q – Nitrides and Related Bulk Materials , 2007 , 1040-Q09-05
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Iwasaki, W., Int. J. Hydrogen Energy 28 (2003) 59 Google Scholar
2. Pecharsky, V.K., Gschneidner, K.A. Jr, J. Magn. Magn. Mater. 200 (1999) 44 10.1016/S0304-8853(99)00397-2Google Scholar
3. Vogt, O., Mattenberger, K., J. Alloys Compd. 223 (1995) 226–236.Google Scholar
4. Busch, G., Junod, P., Vogt, O., Hulliger, F., Phys. Lett. 6 (1963) 79.Google Scholar
5. Turberfield, K.C., Passell, L., Birgeneau, R.J., Bucher, E., J. Appl. Phys. 42 (1971) 1746.10.1063/1.1660422Google Scholar
6. Nakagawa, T., Sako, K., Arakawa, T., Yamamoto, T.A., J. Alloys Compd. 364 (2004) 3.Google Scholar
7. Nakagawa, T., Sako, K., Arakawa, T., Yamamoto, Takao A., J.Alloys Compd. 408–412 (2006) 187–190 Google Scholar
8. Hashimoto, T., Matsumoto, K., Kurihara, T., Numazawa, T., Tomokiyo, A., Yayama, H., Goto, T., Todo, S., Sahashi, M., Adv. Cryog. Eng. 32 (1986) 279.Google Scholar
9. Tomokiyo, A., Yayama, H., Wakabayashi, H., Kuzuhara, T., Hashimoto, T., Sahashi, M., Inomata, K., Adv. Cryog. Eng. 32 (1986) 295.Google Scholar