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The polycrystal samples of Ho2-xTbxTi2O7(x=0,05,1,15,2) were prepared by solid reaction method. The result of X-ray diffraction (XRD) and dc susceptibility measurement from 2 K to 300 K both indicate that as the content of Tb3+,i.e. x,increases,the system crosses over from Ho2Ti2O7spin ice to Tb2Ti2O7 spin liquid,the lattice constant of cubic pyrochlore increases,while the Curie constant and effective magnetic moment decrease. Especially,the Curie-Weiss temperature decreases from positive to negative with the decrease of x,implying the transition from ferromagnetic Ho2Ti2O7 to anti-ferromagnetic Tb2Ti2O7. The detailed analysis shows that as x in Ho2-xTbxTi2O7 increases,the intensity of long-range dipolar interaction Dnn decreases. Being ferromagnetic or anti-ferromagnetic,and the change in intensity of long-range dipolar interaction, may be the two crucial factors influencing on the system to form spin ice state or cooperative paramagnetic state,i.e. the spin liquid state.
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Keywords:
- spin ice /
- spin liquid /
- spin frustration /
- crystal structure
[1] [1]Canal B,Lacrox C 1998 Phys. Rev. Lett. 80 2933
[2] [2]Lecheminant P,Bernu B,Lhuillier C 1997 Phys. Rev. B 56 2521
[3] [3]Mila F 1998 Phys. Rev. B 81 2356
[4] [4]Shi J,Tang Z,Zhu B P 2007 J. Magnetism and Magnetic Materials 310 1322
[5] [5]Snyder J,Slusky J S,Cava R J,Schiffer P 2001 Nature 413 48
[6] [6]Harris M J,Bramwell S T,McMorrow D F et al 1997 Phys. Rev. Lett. 79 2554
[7] [7]Gingras M J P,den Hertog B C,Faucher M et al 2000 Phys. Rev. B 62 6496
[8] [8]Gardner J S,Dunsiger S R,Gaulin B D et al 1999 Phys. Rev. Lett. 82 1012
[9] [9]Tang Z,Li C Z,Yin D et al 2006 Acta Phys. Sin. 55 6532 (in Chinese)[汤征、李长征、尹镝等 2006 物理学报 55 6532]
[10] ]Cao H B,He L H,Wang F W,Zhang P L 2008 Chin. Phys. B 17 4323
[11] ]Wang L L,Xiong R,Wei W et al 2008 Acta Phys. Sin. 57 4334(in Chinese)[汪丽莉、熊锐、魏伟等 2008 物理学报 57 4334
[12] ]Matsuhira K,Hinatsu Y,Tenya K,Sakakibata T 2000 J. Phys.:Condes. Matter 12 649
[13] ]Zhao L H,Tian Z D,Tang Z et al 2007 Wuhan Universtity Journal of Natural and Science 12 1039
[14] ]Chang L J,Terashita H,Schweika W et al 2007 J. Magnetism and Magnetic Materials 310 1293
[15] ]Bramwell S T,Field M N,Harris M J,Parkin I P 2000 J. Phys.:Condens. Matter 12 483
[16] ]Den Hertog B C,Gingras M J P 2000 Phys. Rev. Lett. 84 3430
[17] ]Bramwell S T,Gingeras M J P 2001 Science 294 1495
[18] ]Bron M 1968 Dynamics of Crystal Lattice (Oxford Univ. Press,New York)
[19] ]Bramwell S T,Harris M J,den Hertog B C et al 2001 Phys. Rev. Lett. 84 047205
[20] ]Kao Y J,Enjalran M,Maestro A D et al 2003 Phys. Rev. B 68 172407
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[1] [1]Canal B,Lacrox C 1998 Phys. Rev. Lett. 80 2933
[2] [2]Lecheminant P,Bernu B,Lhuillier C 1997 Phys. Rev. B 56 2521
[3] [3]Mila F 1998 Phys. Rev. B 81 2356
[4] [4]Shi J,Tang Z,Zhu B P 2007 J. Magnetism and Magnetic Materials 310 1322
[5] [5]Snyder J,Slusky J S,Cava R J,Schiffer P 2001 Nature 413 48
[6] [6]Harris M J,Bramwell S T,McMorrow D F et al 1997 Phys. Rev. Lett. 79 2554
[7] [7]Gingras M J P,den Hertog B C,Faucher M et al 2000 Phys. Rev. B 62 6496
[8] [8]Gardner J S,Dunsiger S R,Gaulin B D et al 1999 Phys. Rev. Lett. 82 1012
[9] [9]Tang Z,Li C Z,Yin D et al 2006 Acta Phys. Sin. 55 6532 (in Chinese)[汤征、李长征、尹镝等 2006 物理学报 55 6532]
[10] ]Cao H B,He L H,Wang F W,Zhang P L 2008 Chin. Phys. B 17 4323
[11] ]Wang L L,Xiong R,Wei W et al 2008 Acta Phys. Sin. 57 4334(in Chinese)[汪丽莉、熊锐、魏伟等 2008 物理学报 57 4334
[12] ]Matsuhira K,Hinatsu Y,Tenya K,Sakakibata T 2000 J. Phys.:Condes. Matter 12 649
[13] ]Zhao L H,Tian Z D,Tang Z et al 2007 Wuhan Universtity Journal of Natural and Science 12 1039
[14] ]Chang L J,Terashita H,Schweika W et al 2007 J. Magnetism and Magnetic Materials 310 1293
[15] ]Bramwell S T,Field M N,Harris M J,Parkin I P 2000 J. Phys.:Condens. Matter 12 483
[16] ]Den Hertog B C,Gingras M J P 2000 Phys. Rev. Lett. 84 3430
[17] ]Bramwell S T,Gingeras M J P 2001 Science 294 1495
[18] ]Bron M 1968 Dynamics of Crystal Lattice (Oxford Univ. Press,New York)
[19] ]Bramwell S T,Harris M J,den Hertog B C et al 2001 Phys. Rev. Lett. 84 047205
[20] ]Kao Y J,Enjalran M,Maestro A D et al 2003 Phys. Rev. B 68 172407
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