Quadrupolar Kondo Effect in Non-Kramers Doublet System PrInAg_2

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Abstract

We performed ultrasonic measurement on the rare-earth intermetallic compound PrInAg<SUB>2</SUB> to examine the quadrupolar Kondo effect associated with the non-Kramers Γ<SUB>3</SUB> doublet ground state. The characteristic softening of the elastic constant (<I>c</I><SUB>11</SUB>−<I>c</I><SUB>12</SUB>)⁄2 below 10 K in PrInAg<SUB>2</SUB> is attributed to the Curie term in quadrupolar susceptibility for the quadrupole <I>O</I><SUB>2</SUB><SUP>2</SUP>=<I>J<SUB>x</SUB></I><SUP>2</SUP>−<I>J<SUB>y</SUB></I><SUP>2</SUP> of the stable Γ<SUB>3</SUB> ground state. (<I>c</I><SUB>11</SUB>−<I>c</I><SUB>12</SUB>)⁄2 turns to a slight increase with the −ln<I>T</I> dependence below 0.1 K, which suggests the quenching of the quadrupolar moment in the quadrupolar Kondo state. Under applied magnetic fields of 10 T and 15 T above 8.7 T corresponding to the Kondo temperature <I>T</I><SUB>K</SUB> of ∼0.86 K, the behavior of (<I>c</I><SUB>11</SUB>−<I>c</I><SUB>12</SUB>)⁄2 is described in terms of quadrupolar susceptibility for the stable 4f<SUP>2</SUP> state.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 75(1), "13704-1"-"13704-4", 2006-01-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110003482816
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00319015
  • NDL Article ID
    7771953
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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