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RISS 인기검색어
- 검색키워드
- 저자 : Toru Shigeoka (검색결과 2 건)
- 무료
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Multi-step Metamagnetic Processes of PrPd2Si2 Single Crystal
Toru Shigeoka,Tetsuya Fujiwara,Keiichi Koyama,Shojiro Kimura,Kazuo Watanabe 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Magnetic studies were performed on PrPd2Si2 single crystals which crystallize in the tetragonalThCr2Si2-type structure. The temperature dependence of the magnetic susceptibility indicates thatthe compound orders antiferromagnetically at temperatures below TN = 3.2 K. The transition wasconfirmed by specific heat measurements. Magnetization measurements at fields up to 18 T showthat the easy magnetization direction is the [100] direction in the basal plane. In the magnetizationprocess, five or four metamagnetic transitions appear; the process is a five (four)-step metamagneticone. The [110] magnetization process is a three-step one. A strong magnetic anisotropy betweenthe [100] and [110] directions is observed within the basal plane for high magnetic fields. Alongthe hard magnetization direction of the c-axis, a metamagnetic transition appears. The B[100] − Tphase diagram was constructed. A magnetic anisotropy between the [100] and [001] directions isalso strong. These behaviors are discussed based on an analysis of crystalline field effects.
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Successive Magnetic Transitions of PrRh2 Single Crystals
Yu Okawara,Jingwei Cui,Tetsuya Fujiwara,Toru Shigeoka,Kazuyuki Matsubayashi,Yoshiya Uwatoko,Shojiro Kimura,Kazuo Watanabe 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Measurements of the magnetization and the specific heat were performed on a PrRh2 single crystal. A strong magnetic anisotropy with the easy magnetization direction of the c-axis is observed. Four anomalies appear in the temperature dependence of magnetic susceptibility along the c-axis;a cusp at TN=52 K, a high peak at T3=38 K, a shoulder at T2=33 K and a small peak at T1=4K are observed, indicating magnetic transitions. The specific heat also shows four anomalies atthe temperatures where the magnetic anomalies appear, confirming the occurrence of successivemagnetic transitions. A clear two-step metamagnetic process appears along the easy magnetizationdirection of the c-axis at low temperatures. The magnetization in the first step is almost constantand is corresponds to (1/5) Ms (Ms: saturation magnetization), indicating that this field-inducedphase has a long period and a stable magnetic structure. A metamagnetic process is hypothesizedon the basis of the magnetic structure. The B001 − T phase diagram is constructed.
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