@article{oai:muroran-it.repo.nii.ac.jp:00007021,
 author = {ISHIKAWA, Takahiro and Ebisu, Shuji and 戎, 修二 and Nagata,  Shoichi and 永田, 正一},
 issue = {7},
 journal = {Physica. B, Condensed matter},
 month = {Apr},
 note = {application/pdf, A dual non-magnetic substitution system on A- and B-sites in the spinel structure has been studied. The mother compound is a ferromagnet CuCr2S4 with the Curie temperature Tc ≅ 380 K. A system of Cu1-xAgxCrSnS4, which is the same notation as (Cu1-xAgx)(Cr0:50Sn0:50)2S4, has been prepared over the entire range of 0.00≦x≦1.00 although the Cr-Sn sublattice is unchanged in the fixed composition of 0.50 on B-sites. All these compounds exhibit the spin-glass phase with the freezing temperature Tg approximately at 16 K in 100 Oe. Since only Cr ions have the magnetic moment on the B-sites, the substitution of Ag for Cu on the A-sites does not influence strongly the spin-glass freezing behavior over the whole composition range. Nevertheless, the magnetization of Cu1-xAgxCrSnS4 with x = 0.50 and 0.55 causes a broad upturn hump over 30–130 K where the spin-glass phase is broken. Strong magnetic field dependence of this hump anomaly has been observed with an irreversibility between zero-field-cooled (ZFC) and field-cooled (FC) magnetizations even though above Tg. The hump is suppressed in higher fields and collapsed down at approximately 1.0 kOe with a tiny trace quantity of the anomaly where the difference between the ZFC and FC processes disappears. The specimen with x = 0.45 shows as mall hump anomaly in low field ≦20 Oe which corresponds to a precursor of the huge anomaly for x = 0.50. The hump anomaly could be attributed to a formation of the cluster-glass. The spin-clusters are embedded in the matrix of spin-glass elements in high degree of disorder without long-range order. All the spins eventually are frozen below Tg. The strange magnetic freezing originates from the delicate dual substitutions. The mechanism of the anomaly is far from a complete picture and remains enigmatic.},
 pages = {1881--1889},
 title = {Spin-glass and novel magnetic behavior in the spinel-type Cu1-xAgxCrSnS4},
 volume = {405},
 year = {2010},
 yomi = {エビス, シュウジ and ナガタ, ショウイチ}
}