Ali, Naushad

Dubenko, I.

Han, J.

I\u27Héritier, Ph.

James, William Joseph

Marasinghe, G. K.

Yelon, William B.

English

Missouri University of Science and Technology (Missouri S&T): Scholars' Mine

Missouri University of Science and Technology Scholars' Mine Physics Faculty Research & Creative Works Physics 01 Jan 2000 The Effects of Substituting Iron for Manganese in SmMn₆Ge₆: Magnetic and Crystallographic Properties J. Han William B. Yelon Missouri University of Science and Technology, yelonw@mst.edu Naushad Ali I. Dubenko et. al. For a complete list of authors, see https://scholarsmine.mst.edu/phys_facwork/318 Follow this and additional works at: https://scholarsmine.mst.edu/phys_facwork  Part of the Chemistry Commons Recommended Citation J. Han et al., "The Effects of Substituting Iron for Manganese in SmMn₆Ge₆: Magnetic and Crystallographic Properties," Institute of Electrical and Electronics Engineers (IEEE), Jan 2000. The definitive version is available at https://doi.org/10.1109/INTMAG.2000.872433 This Article - Conference proceedings is brought to you for free and open access by Scholars' Mine. It has been accepted for inclusion in Physics Faculty Research & Creative Works by an authorized administrator of Scholars' Mine. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact scholarsmine@mst.edu. THE EFFECTS OF SUBSTITUTING IRON FOR MANGANESE IN SmMRGei MAGNETIC AND CRYSTALLOGRAPIIIC PROPERTIES J. Han," G. K. Marasinghe,"' W. J. James,') W. B. Yclon,b' Ph.lH Mer;) I. Dubcnko,d) and N. Midl '' Graduate Cenlerfor Materials Research, University of Missouri-Rolla, Rolla, MO 65409 bJ Research Reactor, University ojMissouri-Columbio, Columbia, MO 6521 1 ') Laboratoie des Mal'riau et du G'nie Phsiqne, ENSPG, 38402 Saint Marlin dH 'res, France Department of Physics, Southem Illinois Universiiy ai Carbondale, Carbondale, IL 62901 Fig. 1 shows thcrmo-magnetic data measured 9 ::; substituted atom. This rate of contraction is almost twice that observed for NdMk, Fe,&, [3] at an applied field of 2000 Oe for SmMn, Fe,Ge, samples. The data for SmMn,Ge,, which is indicative offerromagnetic ordering, is in good agreement with prior work [4]. The Curie temperature of 1 0: SmMn,,,Fe,,G%, 446 K, is similar to that of SmMQGe,. However, the Curie temperature E 3; decreasesrapidly as the iron content increases beyond 5 o x =  0.5, seeFig. I .  Inaddition, the thermomagnetic $ 6 data show another magnetic transition, in addition to that at the Curie Temperature, occurring around 50 K 5 45 30 2 15 To;: - ) ------cas ; *=='-o: 3;,\ , :  : - , ' ' ' ' ' ' - x=1.5 The magnetization ofSmMn,,,Fe,,Ge, approaches that of SmMn@e, at high applied fields, in excess of 7 and 75 3 T at 30 and 300 K, respectively. Here again, the - magnctization drops drastically as the iron content 5 50 exceeds x = 0.5. As a result, SmMn,Fe,Ge, and ?. SmMn,,Fe,,sGe, do not magnetically saturate even at 5 25 an applied field of 8 T. M vs. H data for SmMn, 4 ,Fe,Ge, samples are remarkably similar to that for NdMn,,Fe,Ge, [3].As was the caseforNdMk,Fe,Ge, intermetallics, the magnetic moment of the iron sublattice appears to couple antifem/ferrimagnetically with fenomagntically coupled moments of the 2o manganese and samarium sublattices. Fig.3 compares the XRD pattem for random 0 powders of SmMn,,Fe,.,Ge, with that of powders 0 20000 400W 6WOO BOW0 magnetically aligned in the reflecting plane of the XRD A p p l i i  field (De) The authors thankfully acknowledge the 5 financial support of the National Science Foundation 5 (NSF) for grant DMR-9614596 and the Defense Advanced Research Projects Agency (DARPA) for sample. indicate hat basal are Fig. 2. Magnetization vs applied field for SmMn, preferentially oriented parallel to the reflecting surface xFqCe6intmcUlics measured at 30 and 3oo K. of the XRD specimen. Taking in to account that the aligning field was parallel to the surface. we conclude The growth of the (002) reflection upon Rindom ' ,<.A$ /("" : Powds's msgnsticab'y aiianedinpbane Appl. [41 B.Phys. Chafik El Idrissi, G.Venhlrioi, B. and Fig. 2. X-ray diffraction d m  for random (top) and magnetically aligned (bottom) powders of E. Ressouche,JoumalofANoys and Compounds, 215 SmMn,,Fe,,G%. The magnetic field was applied (1 994) 187. parallel ta the 6amule surface. Lines marked by a (*)belong lo the impurity 1:22: phase. 0-7803-5943-7 4/00/$10.00 2000 IEEE. HR -06 

The Effects of Substituting Iron for Manganese in SmMn₆Ge₆: Magnetic and Crystallographic Properties

https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=1317&context=phys_facwork

The Effects of Substituting Iron for Manganese in SmMn₆Ge₆: Magnetic and Crystallographic Properties

Abstract

Similar works

Full text

Available Versions

Missouri University of Science and Technology (Missouri S&T): Scholars' Mine