J. Rodriguez, Recent advances in magnetic structure determination by neutron powder diffraction, Physica B: Condensed Matter, vol.192, issue.1-2, p.55, 1993.
DOI : 10.1016/0921-4526(93)90108-I

H. M. Rietveld, A profile refinement method for nuclear and magnetic structures, Journal of Applied Crystallography, vol.2, issue.2, p.65, 1969.
DOI : 10.1107/S0021889869006558

R. A. Young, The Rietveld Method, 1993.

R. Castaing and A. Guinier, Point-by-Point Chemical Analysis by X-Ray Spectroscopy, Analytical Chemistry, vol.25, issue.5, p.724, 1953.
DOI : 10.1021/ac60077a011

R. Castaing, Advances in Electronics and Electron Physics, p.317, 1960.

J. A. Mydosh, Spin Glasses : An experimental Introduction, 1993.
DOI : 10.4324/9780203221358

W. F. Giauque, A THERMODYNAMIC TREATMENT OF CERTAIN MAGNETIC EFFECTS. A PROPOSED METHOD OF PRODUCING TEMPERATURES CONSIDERABLY BELOW 1?? ABSOLUTE, Journal of the American Chemical Society, vol.49, issue.8, p.1864, 1927.
DOI : 10.1021/ja01407a003

W. F. Giauque, PARAMAGNETISM AND THE THIRD LAW OF THERMO-DYNAMICS. INTERPRETATION OF THE LOW-TEMPERATURE MAGNETIC SUSCEPTIBILITY OF GADOLINIUM SULFATE, Journal of the American Chemical Society, vol.49, issue.8, p.1870, 1927.
DOI : 10.1021/ja01407a004

K. A. Gschneidner-jr, V. K. Pecharsky, and A. O. , Recent developments in magnetocaloric materials, Reports on Progress in Physics, vol.68, issue.6, p.1479, 2005.
DOI : 10.1088/0034-4885/68/6/R04

. Talbot, For Refrigeration Problems, a Magnetically Attractive Solution, National Institute of Standards and Technology (NIST), 2009.

A. M. Tishin and Y. I. Spichkin, The Magnetocaloric Effect and its Applications, 2003.

P. Villars and K. , Pearson's Crystal Data: Crystal Structure for Inorganic Compounds, 2010.

M. D. Bojin and R. Hoffmann, The RE???M???E Phases, Helvetica Chimica Acta, vol.86, issue.5, p.1653, 2003.
DOI : 10.1002/hlca.200390140

U. C. Rodewald, B. Chevalier, and R. Pöttgen, Rare earth???transition metal???magnesium compounds???An overview, Journal of Solid State Chemistry, vol.180, issue.5, p.1720, 2007.
DOI : 10.1016/j.jssc.2007.03.007

URL : https://hal.archives-ouvertes.fr/hal-00147928

R. Welter, Doctorat de l'Université Henri Poincaré -Nancy I, 1994.

W. N. Stassen, M. Sato, and L. D. Calvert, Sb, Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, vol.26, issue.10, p.1534, 1970.
DOI : 10.1107/S0567740870004442

G. Venturini, B. Malaman, and E. Ressouche, Neutron diffraction study of the TbMnGe compound, Journal of Alloys and Compounds, vol.243, issue.1-2, p.98, 1996.
DOI : 10.1016/S0925-8388(96)02388-2

M. C. Marker, H. S. Effenberger, and K. W. Richter, Crystal structures, site occupations and phase equilibria in the system V???Zr???Ge, Solid State Sciences, vol.11, issue.8, p.1475, 2009.
DOI : 10.1016/j.solidstatesciences.2009.05.005

B. Chevalier, W. Hermes, E. Gaudin, and R. Pöttgen, New high temperature modification of CeTiGe: structural characterization and physical properties, Journal of Physics: Condensed Matter, vol.22, issue.14, p.146003, 2010.
DOI : 10.1088/0953-8984/22/14/146003

URL : https://hal.archives-ouvertes.fr/hal-00467039

A. V. Morozkin and I. A. Sviridov, New ternary CeScSi-type RTi0.85Mo0.15Ge compounds (R=Gd???Tm, Lu), Journal of Alloys and Compounds, vol.296, issue.1-2, p.6, 2000.
DOI : 10.1016/S0925-8388(99)00517-4

P. Manfrinetti, A. Provino, and K. A. Gschneidner-jr, On the RMgSn rare earth compounds, Journal of Alloys and Compounds, vol.482, issue.1-2, p.81, 2009.
DOI : 10.1016/j.jallcom.2009.03.178

G. Venturini, Doctorat d'état de l'Université Henri Poincaré -Nancy I, 1989.

E. Teatum, K. Gschneidner, and J. Waber, The Crystal Chemistry and Physics of Metal and Alloys, 1972.

P. Villars and K. , Pearson's Crystal Data: Crystal Structure for Inorganic Compounds, 2010.

B. Chevalier, W. Hermes, E. Gaudin, and R. Pöttgen, New high temperature modification of CeTiGe: structural characterization and physical properties, Journal of Physics: Condensed Matter, vol.22, issue.14, p.146003, 2010.
DOI : 10.1088/0953-8984/22/14/146003

URL : https://hal.archives-ouvertes.fr/hal-00467039

P. G. De-gennes, Interactions indirectes entre couches 4f dans les m??taux de terres rares, Journal de Physique et le Radium, vol.126, issue.8-9, p.510, 1962.
DOI : 10.1051/jphysrad:01962002308-9051001

A. Szytula, Crystal Structures and Magnetic Properties of RTX Rare Earth Intermetallics, 1998.

B. Malaman, G. Venturini, A. Blaise, J. P. Sanchez, and G. Amoretti, compounds by susceptibility measurements, neutron diffraction, and M??ssbauer spectroscopy, Physical Review B, vol.23, issue.107, p.8681, 1993.
DOI : 10.1016/0022-3697(62)90192-0

G. Le-caer and J. M. Dubois, Evaluation of hyperfine parameter distributions from overlapped Mossbauer spectra of amorphous alloys, Journal of Physics E: Scientific Instruments, vol.12, issue.11, p.1083, 1979.
DOI : 10.1088/0022-3735/12/11/018

C. Hohenemser, -Sn for 1.3 to 370??K, Physical Review, vol.136, issue.1A, p.185, 1965.
DOI : 10.1103/PhysRev.136.A464

J. M. Cadogan and D. H. Ryan, Solid State Phen, 2011.

S. Couillaud, E. Gaudin, V. Franco, A. Conde, R. Pöttgen et al., The magnetocaloric properties of GdScSi and GdScGe, Intermetallics, vol.19, issue.10, p.1573, 2011.
DOI : 10.1016/j.intermet.2011.06.001

URL : https://hal.archives-ouvertes.fr/hal-00617236

S. Tencé, G. André, E. Gaudin, and B. Chevalier, Modulated magnetic structures of the antiferromagnetic hydride CeRuSiH, Journal of Physics: Condensed Matter, vol.20, issue.25, p.255239, 2008.
DOI : 10.1088/0953-8984/20/25/255239

V. Ban, Master de l'Université Henri Poincaré -Nancy I, 2007.

P. G. De-gennes, Interactions indirectes entre couches 4f dans les m??taux de terres rares, Journal de Physique et le Radium, vol.126, issue.8-9, p.510, 1962.
DOI : 10.1051/jphysrad:01962002308-9051001

A. P. Vokhmyanin and Y. A. Dorofeev, Magnetic structure of Er5Ge3 at 4.2 K, Physics of the Solid State, vol.186, issue.1???2, p.1735, 2003.
DOI : 10.1016/S0304-8853(98)00055-9

H. Ahmadvand, H. Salamati, and P. Kameli, The effect of grain boundaries on the domain wall dynamics in Pr1???xAgxMnO3 manganites, Journal of Applied Physics, vol.107, issue.8, p.83913, 2010.
DOI : 10.1088/0953-8984/20/27/275207

S. Rayaprol and R. Pöttgen, -type intermetallic with ferromagnetic ordering and spin glass anomalies, Physical Review B, vol.49, issue.291, p.214403, 2006.
DOI : 10.1063/1.1405827

A. Szytula and J. Leciejewicz, Handbook on the Physics and Chemistry of Rare Earths, p.83, 1989.

A. Szytula, Handbook of Magnetic Materials, 1991.

B. Malaman, G. Venturini, A. Blaise, J. P. Sanchez, and G. Amoretti, compounds by susceptibility measurements, neutron diffraction, and M??ssbauer spectroscopy, Physical Review B, vol.23, issue.107, p.8681, 1993.
DOI : 10.1016/0022-3697(62)90192-0

V. Klosek, A. Vernière, B. Malaman, J. Tobola, and S. Kaprzyk, compounds upon filling with carbon, Physical Review B, vol.91, issue.10, p.104419, 2008.
DOI : 10.1088/0370-1298/65/3/308

O. Moze, M. Hofmann, J. M. Cadogan, K. H. Buschow, and D. H. Ryan, Magnetic order in RCr$\mathsf{_{2}}$Si$\mathsf{_{2}}$ intermetallics, The European Physical Journal B - Condensed Matter, vol.36, issue.4, p.511, 2003.
DOI : 10.1140/epjb/e2004-00006-4

. Teatum, dans The Crystal Chemistry and Physics of Metal and Alloys, édité par, 1972.

M. A. Fremy, D. Gignoux, J. M. Moreau, D. Paccard, and L. Paccard, RM3Ga2 Compounds (R ??? rare earth, M ??? Co, Ni): A new structural series, Journal of the Less Common Metals, vol.106, issue.2, p.251, 1985.
DOI : 10.1016/0022-5088(85)90260-7

G. Venturini, Doctorat d'état de l'Université Henri Poincaré -Nancy I, 1989.

W. Rieger, H. Nowotny, and F. Benesovsky, Verbindungen mit aufgef???lltem Mn5Si3-Typ, Monatshefte f???r Chemie, vol.96, issue.1, p.98, 1965.
DOI : 10.1007/BF00912298

P. Villars and K. , Cenzual, Pearson's Crystal Data: Crystal Structure for Inorganic Compounds, p.23

T. Ni, Pour des valeurs de x 0,4 des pics de diffraction supplémentaires apparaissent Ils correspondant aux composés Gd(Mn 1-x T x ) 12 et Gd(Mn 1-x T x ) 2 , indiquant la limite de solubilité du cobalt et du nickel dans le composé Gd 6 Mn 23 . Ces phases sont présentent en assez faible quantité (< 4 % massiques) dans l'échantillon Gd 6 (Mn 0,6 Co 0,4 ) 23 , mais leurs teneurs augmentent fortement pour des concentrations en cobalt supérieures. Ces résultats indiquent que la substitution de Mn (par Co ou Ni) ne conduit qu'à une solution solide partielle, en accord avec l'absence des 100%. Ce décalage en composition reste cependant raisonnable si l'on tient compte des erreurs de mesure. Les échantillons Gd 6 (Mn 1-x Ni x ) 23 présentent pour x ? 0,1 des teneurs en nickel très proches des compositions nominales et, deux compositions chimiques différentes relativement homogènes

. Du-fait-de-la, Mn 23 et de l'inhomogénéité chimique de la solution solide Gd 6 (Mn 1-x Ni x ) 23 , seuls les résultats relatifs aux propriétés magnétiques et magnétocaloriques des solutions solides Gd 6 (Mn 1-x Fe x ) 23 et Gd 6 (Mn 1-x Co x ) 23 , seront présentés, p.23

. Les-courbes-d, aimantation en température des composés Gd 6 (Mn 1-x Fe x ) 23 pour lesquels x ? 0

F. E. Wang, J. V. Gilfrich, D. W. Ernst, and W. M. Hubbard, Report on the crystal structure of Gd6Mn23, Acta Crystallographica, vol.17, issue.7, p.931, 1964.
DOI : 10.1107/S0365110X64002420

J. V. Florio, R. E. Rundle, and A. I. Snow, Compounds of thorium with transition metals. I. The thorium???manganese system, Acta Crystallographica, vol.5, issue.4, p.449, 1952.
DOI : 10.1107/S0365110X52001337

E. Teatum, K. Gschneidner, and J. Waber, The Crystal Chemistry and Physics of Metal and Alloys, 1972.

I. S. Dubenko, I. Y. Gaidukova, S. A. Granovsky, E. Gratz, D. Gurjazkas et al., Strongly enhanced thermal expansion in binary Y-Mn intermetallic compounds YMn2, Y6Mn23 and YMn12, Solid State Communications, vol.103, issue.8, p.495, 1997.
DOI : 10.1016/S0038-1098(97)00215-9

M. Ohta, A. Fujita, K. Fukamichi, E. Matsubara, and H. Takahashi, Anti-invar behaviour due to spin fluctuations in Y6(Mn1-xFex)23 compounds, Journal of Physics: Condensed Matter, vol.14, issue.23, p.5785, 2002.
DOI : 10.1088/0953-8984/14/23/310

P. G. De-gennes, Interactions indirectes entre couches 4f dans les m??taux de terres rares, Journal de Physique et le Radium, vol.126, issue.8-9, p.510, 1962.
DOI : 10.1051/jphysrad:01962002308-9051001

I. A. Campbell, Indirect exchange for rare earths in metals, Journal of Physics F: Metal Physics, vol.2, issue.3, p.47, 1972.
DOI : 10.1088/0305-4608/2/3/004

A. M. Tishin and Y. I. Spichkin, The Magnetocaloric Effect and its Applications, 2003.

W. Zarek and M. Pardavi-horvath, Magnetic behaviour of Sm6Mn23???xFex compounds, Journal of Magnetism and Magnetic Materials, vol.21, issue.1, p.47, 1980.
DOI : 10.1016/0304-8853(80)90486-2

L. Jingqi, Q. Jiqin, D. Ren, Z. Yinghong, and H. Jinli, The isothermal section of the Gd???Mn???Ti ternary system at 773K, Journal of Alloys and Compounds, vol.414, issue.1-2, p.97, 2006.
DOI : 10.1016/j.jallcom.2005.07.028

P. I. Kripyakevich, D. P. Frankevich, Y. V. Voroshilov, and . Sov, Compounds with Th6Mn23-type structures in alloys of the rare-earth metals with manganese and iron, Soviet Powder Metallurgy and Metal Ceramics, vol.9, issue.1, p.915, 1965.
DOI : 10.1007/BF00773697

Z. Yinghong, D. Ronghui, L. Jingqi, O. Xiaobin, and D. Haixia, The isothermal section of the Gd???Mn???Ni ternary system at 803 K, Journal of Alloys and Compounds, vol.346, issue.1-2, p.181, 2002.
DOI : 10.1016/S0925-8388(02)00505-4

L. Chaleur-spécifique-d, un matériau est définie comme la quantité d'énergie à apporter par échange thermique pour élever sa température d'un degré. A pression constante on peut écrire : D'après le second principe de la thermodynamique, pour toute transformation réversible : On peut donc écrire

A. M. Tishin and Y. I. Spichkin, The Magnetocaloric Effect and its Applications, 2003.
DOI : 10.1201/9781420033373

L. Courbes-de-densités-d, états électroniques présentées correspondent à : -la densité d'états totale par cellule de Wigner-Seitz et la densité d'états totale à l'intérieur des sphères "muffin tin", -les densités d'états projetées sur chaque site de la structure cristalline et leur décomposition en fonction des orbitales atomiques (s, p, d, f)

A. Bansil, S. Kaprzyk, P. E. Mijnarends, and J. Tobola, Ga, and Al) alloys by the KKR-CPA method, Physical Review B, vol.59, issue.188, p.13396, 1999.
DOI : 10.1007/BF02401250

T. Stopa, S. Kaprzyk, and J. Tobola, Linear aspects of the Korringa???Kohn???Rostoker formalism, Journal of Physics: Condensed Matter, vol.16, issue.28, p.4921, 2004.
DOI : 10.1088/0953-8984/16/28/012

D. Figure, 9 : Cartographies et spectre NRA de la phase pauvre en bore (zone encadrée) dans l'échantillon Dy 3