Giant magnetoresistance in Ce2Fe17
Physical Review B - Condensed Matter and Materials Physics Volume 56 Issue 21
Page 13 716-13 719
published_at 1997-12-01
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| File | |
| Title ( eng ) |
Giant magnetoresistance in Ce2Fe17
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| Creator |
Janssen Yuri
Fujii Hironobu
Izawa Koichi
Fujita Toshizo
De Boer Frank R.
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| Source Title |
Physical Review B - Condensed Matter and Materials Physics
|
| Volume | 56 |
| Issue | 21 |
| Start Page | 13 716 |
| End Page | 13 719 |
| Abstract |
Using a single-phase sample of Ce2Fe17 with the rhombohedral Th2Zn17-type structure, we measured the magnetization, resistivity, and specific heat under various magnetic fields up to 5.5 T. Below Tc=125 K, giant magnetoresistance (GMR) is induced by the metamagnetic transition from the antiferromagnetic to ferromagnetic states. The value of Δρ/ρ(≅ρAF-ρF)/ρ AF) reaches 0.85 at 4.2 K, while the value γ(≅C/T at 0 K) of 351 mJ/K2/mole in zero field only decreases ∼20% by the metamagnetic transition. These results suggest that GMR is due to the closing of a superzone gap formed by antiferromagnetic ordering of Fe spins, while the large γ value is due to valence fluctuations of the Ce-4f electrons, weakly dependent on magnetic field.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 1997-12-01 |
| Rights |
Copyright (c) 1997 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0163-1829
[DOI] 10.1103/PhysRevB.56.13716
[NCID] AA00362255
[DOI] http://dx.doi.org/10.1103/PhysRevB.56.13716
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