Effects of antiferro-ferromagnetic phase coexistence and spin fluctuations on the magnetic and related properties of NdCuSi
作者： Sachin Gupta , K. G. Suresh , A. Das , A. K. Nigam , A. Hoser
DOI: 10.1063/1.4922387
关键词: Spin-½ 、 Ferromagnetism 、 Neutron diffraction 、 Giant magnetoresistance 、 Magnetoresistance 、 Materials science 、 Condensed matter physics 、 Electrical resistivity and conductivity 、 Antiferromagnetism 、 Magnetic refrigeration
摘要: Polycrystalline NdCuSi is found to show co-existence of antiferromagnetic (AFM) and ferromagnetic (FM) phases at low temperatures, as revealed by neutron diffraction data. The coexistence attributed the competing exchange interactions crystal field effect. compound shows a large, low-field magnetoresistance (MR) ∼ − 32% 20 kOe below TN (3.1 K), which becomes 36% 50 kOe. MR value be highest among RTX compounds. Magnetocaloric effect (MCE) also large ∼11 J/kg K close TN. Resistivity data presence spin fluctuations, get suppressed applied field. Large MCE in this arise due two phases. dependencies quadratic behavior, confirming fluctuations.
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sci-hub.se 参考文章(36)
R. von Helmolt, J. Wecker, B. Holzapfel, L. Schultz, K. Samwer, Giant negative magnetoresistance in perovskitelike La2/3Ba1/3MnOx ferromagnetic films. Physical Review Letters. ,vol. 71, pp. 2331- 2333 ,(1993) , 10.1103/PHYSREVLETT.71.2331
A. Midya, P. Mandal, S. Das, S. Banerjee, L. S. Sharath Chandra, V. Ganesan, S. Roy Barman, Magnetocaloric effect in HoMnO3 crystal Applied Physics Letters. ,vol. 96, pp. 142514- ,(2010) , 10.1063/1.3386541
Wolfhart Rieger, Erwin Parth�, Ternäre Erdalkali-und Seltene Erd-Silicide und-Germanide mit AlB 2 -Struktur Monatshefte Fur Chemie. ,vol. 100, pp. 439- 443 ,(1969) , 10.1007/BF00904085
L. Morellon, J. Stankiewicz, B. Garcı́a-Landa, P. A. Algarabel, M. R. Ibarra, GIANT MAGNETORESISTANCE NEAR THE MAGNETOSTRUCTURAL TRANSITION IN GD5(SI1.8GE2.2) Applied Physics Letters. ,vol. 73, pp. 3462- 3464 ,(1998) , 10.1063/1.122797
E. V. Sampathkumaran, I. Das, R. Rawat, Subham Majumdar, Magnetocaloric effect in Gd2PdSi3 Applied Physics Letters. ,vol. 77, pp. 418- 420 ,(2000) , 10.1063/1.126995
Jolanta Stankiewicz, Juan Bartolomé, Magali Morales, Madeleine Bacmann, Daniel Fruchart, Resistivity of RMn12−xFex alloys Journal of Applied Physics. ,vol. 90, pp. 5632- 5636 ,(2001) , 10.1063/1.1413496
R. B. van Dover, E. M. Gyorgy, R. J. Cava, J. J. Krajewski, R. J. Felder, W. F. Peck, Magnetoresistance of SmMn2Ge2: A layered antiferromagnet. Physical Review B. ,vol. 47, pp. 6134- 6137 ,(1993) , 10.1103/PHYSREVB.47.6134
Sachin Gupta, R. Rawat, K. G. Suresh, Field induced large magnetocaloric effect and magnetoresistance in ErNiSi arXiv: Strongly Correlated Electrons. ,(2014) , 10.1063/1.4887336
R Rawat, I Das, Magnetocaloric and magnetoresistance studies of GdPd2Si Journal of Physics: Condensed Matter. ,vol. 13, ,(2001) , 10.1088/0953-8984/13/3/102
M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, J. Chazelas, Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices. Physical Review Letters. ,vol. 61, pp. 2472- 2475 ,(1988) , 10.1103/PHYSREVLETT.61.2472