Low-Temperature Properties of CePt_3P Tuned by Magnetic Field
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摘要
We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K~2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ∝T~n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.
We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K~2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ∝T~n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.
We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K~2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ∝T~n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.
引文
[1]Hewson A C 1993 The Kondo Problem to Heavy Fermions(Cambridge:Cambridge University Press)
[2]Stewart G R 2001 Rev.Mod.Phys.73 797Stewart G R 2006 Rev.Mod.Phys.78 743
[3]L?hneysen H v,Rosch A,Vojta M and W?lfle P 2007 Rev.Mod.Phys.79 1015
[4]Sachdev S 2000 Science 288 475
[5]Coleman P,Pépin C,Si Q M and Ramazashvili R 2001 J.Phys.:Condens.Matter 13 R723
[6]Si Q M,Rabello S,Ingersent K and Smith J U 2001 Nature413 804
[7]Doniach S 1977 Physica B+C 91 231
[8]Balicas L,Nakatsuji S,Lee H,Schlottmann P,Murphy T Pand Fisk Z 2005 Phys.Rev.B 72 064422
[9]Mun E,Bud’ko S L and Canfield P C 2010 Phys.Rev.B82 054424
[10]Gegenwart P,Custers J,Geibel C,Neumaier K,Tayama T,Tenya K,Trovarelli O and Steglich F 2002 Phys.Rev.Lett.89 056402
[11]Bud’ko S L,Morosan E and Canfield P C 2004 Phys.Rev.B 69 014415
[12]Chen J,Wang Z,Zheng S Y,Feng C M,Dai J H and Xu ZA 2017 Sci.Rep.7 41853
[13]Takayama T,Kuwano K,Hirai D,Katsura Y,Yamamoto A and Takagi H 2012 Phys.Rev.Lett.108 237001
[14]Chen H,Xu X F,Cao C and Dai J H 2012 Phys.Rev.B86 125116
[15]Kang C J,Ahn K H,Lee K W and Min B I 2013 J.Phys.Soc.Jpn.82 053703
[16]Subedi A,Ortenzi L and Boeri L 2013 Phys.Rev.B 87144504
[17]Zocco D A,Krannich S,Heid R,Bohnen K P,Wolf T,Forrest T,Bosak A and Weber F 2015 Phys.Rev.B 92 220504
[18]Schotte K D and Schotte U 1975 Phys.Lett.A 55 38
[19]Bud’ko S L,Canfield P C,Avila M A and Takabatake T2007 Phys.Rev.B 75 094433
[20]Custers J,Gegenwart P,Wilhelm H,Neumaier K,Tokiwa Y,Trovarelli O,Geibel C,Steglich F,Pépin C and Coleman P 2003 Nature 424 524
[21]Niklowitz P G,Knebel G,Flouquet J,Bud’ko S L and Canfield P C 2006 Phys.Rev.B 73 125101
[2]Stewart G R 2001 Rev.Mod.Phys.73 797Stewart G R 2006 Rev.Mod.Phys.78 743
[3]L?hneysen H v,Rosch A,Vojta M and W?lfle P 2007 Rev.Mod.Phys.79 1015
[4]Sachdev S 2000 Science 288 475
[5]Coleman P,Pépin C,Si Q M and Ramazashvili R 2001 J.Phys.:Condens.Matter 13 R723
[6]Si Q M,Rabello S,Ingersent K and Smith J U 2001 Nature413 804
[7]Doniach S 1977 Physica B+C 91 231
[8]Balicas L,Nakatsuji S,Lee H,Schlottmann P,Murphy T Pand Fisk Z 2005 Phys.Rev.B 72 064422
[9]Mun E,Bud’ko S L and Canfield P C 2010 Phys.Rev.B82 054424
[10]Gegenwart P,Custers J,Geibel C,Neumaier K,Tayama T,Tenya K,Trovarelli O and Steglich F 2002 Phys.Rev.Lett.89 056402
[11]Bud’ko S L,Morosan E and Canfield P C 2004 Phys.Rev.B 69 014415
[12]Chen J,Wang Z,Zheng S Y,Feng C M,Dai J H and Xu ZA 2017 Sci.Rep.7 41853
[13]Takayama T,Kuwano K,Hirai D,Katsura Y,Yamamoto A and Takagi H 2012 Phys.Rev.Lett.108 237001
[14]Chen H,Xu X F,Cao C and Dai J H 2012 Phys.Rev.B86 125116
[15]Kang C J,Ahn K H,Lee K W and Min B I 2013 J.Phys.Soc.Jpn.82 053703
[16]Subedi A,Ortenzi L and Boeri L 2013 Phys.Rev.B 87144504
[17]Zocco D A,Krannich S,Heid R,Bohnen K P,Wolf T,Forrest T,Bosak A and Weber F 2015 Phys.Rev.B 92 220504
[18]Schotte K D and Schotte U 1975 Phys.Lett.A 55 38
[19]Bud’ko S L,Canfield P C,Avila M A and Takabatake T2007 Phys.Rev.B 75 094433
[20]Custers J,Gegenwart P,Wilhelm H,Neumaier K,Tokiwa Y,Trovarelli O,Geibel C,Steglich F,Pépin C and Coleman P 2003 Nature 424 524
[21]Niklowitz P G,Knebel G,Flouquet J,Bud’ko S L and Canfield P C 2006 Phys.Rev.B 73 125101